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Finding the Fourth Proportional to 527,807.80, 791,711.70 and 487,257.40

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Solution

The fourth proportional to 527,807.80, 791,711.70 and 487,257.40 is: 730,886.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,807.80 : 791,711.70 = 487,257.40 : x
  2. Step 2: Convert to fraction form
    527,807.80/791,711.70 = 487,257.40/x
  3. Step 3: Cross multiply
    527,807.80x = 791,711.70 × 487,257.40
  4. Step 4: Simplify right side
    527,807.80x = 385,767,384,491.58
  5. Step 5: Solve for x
    x = 385,767,384,491.58/527,807.80
  6. Step 6: Final answer
    x = 730,886.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.