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Finding the Fourth Proportional to 713,404.67, 984,498.20 and 391,107.85

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Solution

The fourth proportional to 713,404.67, 984,498.20 and 391,107.85 is: 539,728.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,404.67 : 984,498.20 = 391,107.85 : x
  2. Step 2: Convert to fraction form
    713,404.67/984,498.20 = 391,107.85/x
  3. Step 3: Cross multiply
    713,404.67x = 984,498.20 × 391,107.85
  4. Step 4: Simplify right side
    713,404.67x = 385,044,974,330.87
  5. Step 5: Solve for x
    x = 385,044,974,330.87/713,404.67
  6. Step 6: Final answer
    x = 539,728.70

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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.