Home / 739,340.87-1,020,290.45-399,809.12

Finding the Fourth Proportional to 739,340.87, 1,020,290.45 and 399,809.12

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Solution

The fourth proportional to 739,340.87, 1,020,290.45 and 399,809.12 is: 551,736.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,340.87 : 1,020,290.45 = 399,809.12 : x
  2. Step 2: Convert to fraction form
    739,340.87/1,020,290.45 = 399,809.12/x
  3. Step 3: Cross multiply
    739,340.87x = 1,020,290.45 × 399,809.12
  4. Step 4: Simplify right side
    739,340.87x = 407,921,419,858.41
  5. Step 5: Solve for x
    x = 407,921,419,858.41/739,340.87
  6. Step 6: Final answer
    x = 551,736.61

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Double scale
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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.