Home / 678,123.20-1,017,184.80-394,299.20

Finding the Fourth Proportional to 678,123.20, 1,017,184.80 and 394,299.20

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Solution

The fourth proportional to 678,123.20, 1,017,184.80 and 394,299.20 is: 591,448.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,123.20 : 1,017,184.80 = 394,299.20 : x
  2. Step 2: Convert to fraction form
    678,123.20/1,017,184.80 = 394,299.20/x
  3. Step 3: Cross multiply
    678,123.20x = 1,017,184.80 × 394,299.20
  4. Step 4: Simplify right side
    678,123.20x = 401,075,152,892.16
  5. Step 5: Solve for x
    x = 401,075,152,892.16/678,123.20
  6. Step 6: Final answer
    x = 591,448.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.