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Finding the Fourth Proportional to 713,423.54, 984,498.36 and 391,126.57

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Solution

The fourth proportional to 713,423.54, 984,498.36 and 391,126.57 is: 539,740.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,423.54 : 984,498.36 = 391,126.57 : x
  2. Step 2: Convert to fraction form
    713,423.54/984,498.36 = 391,126.57/x
  3. Step 3: Cross multiply
    713,423.54x = 984,498.36 × 391,126.57
  4. Step 4: Simplify right side
    713,423.54x = 385,063,466,717.43
  5. Step 5: Solve for x
    x = 385,063,466,717.43/713,423.54
  6. Step 6: Final answer
    x = 539,740.34

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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.