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Finding the Fourth Proportional to 713,788.38, 985,029.39 and 391,501.13

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Solution

The fourth proportional to 713,788.38, 985,029.39 and 391,501.13 is: 540,272.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,788.38 : 985,029.39 = 391,501.13 : x
  2. Step 2: Convert to fraction form
    713,788.38/985,029.39 = 391,501.13/x
  3. Step 3: Cross multiply
    713,788.38x = 985,029.39 × 391,501.13
  4. Step 4: Simplify right side
    713,788.38x = 385,640,112,385.56
  5. Step 5: Solve for x
    x = 385,640,112,385.56/713,788.38
  6. Step 6: Final answer
    x = 540,272.33

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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.