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Finding the Fourth Proportional to 713,417.29, 984,515.63 and 391,120.47

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Solution

The fourth proportional to 713,417.29, 984,515.63 and 391,120.47 is: 539,746.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,417.29 : 984,515.63 = 391,120.47 : x
  2. Step 2: Convert to fraction form
    713,417.29/984,515.63 = 391,120.47/x
  3. Step 3: Cross multiply
    713,417.29x = 984,515.63 × 391,120.47
  4. Step 4: Simplify right side
    713,417.29x = 385,064,213,972.34
  5. Step 5: Solve for x
    x = 385,064,213,972.34/713,417.29
  6. Step 6: Final answer
    x = 539,746.12

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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.