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Finding the Fourth Proportional to 713,423.79, 984,498.71 and 391,126.82

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Solution

The fourth proportional to 713,423.79, 984,498.71 and 391,126.82 is: 539,740.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,423.79 : 984,498.71 = 391,126.82 : x
  2. Step 2: Convert to fraction form
    713,423.79/984,498.71 = 391,126.82/x
  3. Step 3: Cross multiply
    713,423.79x = 984,498.71 × 391,126.82
  4. Step 4: Simplify right side
    713,423.79x = 385,063,847,780.77
  5. Step 5: Solve for x
    x = 385,063,847,780.77/713,423.79
  6. Step 6: Final answer
    x = 539,740.69

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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.