Home / 724,840.76-1,000,160.20-418,945.68

Finding the Fourth Proportional to 724,840.76, 1,000,160.20 and 418,945.68

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Solution

The fourth proportional to 724,840.76, 1,000,160.20 and 418,945.68 is: 578,075.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,840.76 : 1,000,160.20 = 418,945.68 : x
  2. Step 2: Convert to fraction form
    724,840.76/1,000,160.20 = 418,945.68/x
  3. Step 3: Cross multiply
    724,840.76x = 1,000,160.20 × 418,945.68
  4. Step 4: Simplify right side
    724,840.76x = 419,012,795,097.94
  5. Step 5: Solve for x
    x = 419,012,795,097.94/724,840.76
  6. Step 6: Final answer
    x = 578,075.65

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Half scale
Find fourth proportional to 1,449,681.52, 2,000,320.40 and 837,891.36
Double scale
Find fourth proportional to 724,841.76, 1,000,161.58 and 418,946.68
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.