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Finding the Fourth Proportional to 713,369.80, 984,512.42 and 391,141.36

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Solution

The fourth proportional to 713,369.80, 984,512.42 and 391,141.36 is: 539,809.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,369.80 : 984,512.42 = 391,141.36 : x
  2. Step 2: Convert to fraction form
    713,369.80/984,512.42 = 391,141.36/x
  3. Step 3: Cross multiply
    713,369.80x = 984,512.42 × 391,141.36
  4. Step 4: Simplify right side
    713,369.80x = 385,083,526,895.69
  5. Step 5: Solve for x
    x = 385,083,526,895.69/713,369.80
  6. Step 6: Final answer
    x = 539,809.12

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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.