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Finding the Fourth Proportional to 537,712.20, 807,005.70 and 520,216.20

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Solution

The fourth proportional to 537,712.20, 807,005.70 and 520,216.20 is: 780,747.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    537,712.20 : 807,005.70 = 520,216.20 : x
  2. Step 2: Convert to fraction form
    537,712.20/807,005.70 = 520,216.20/x
  3. Step 3: Cross multiply
    537,712.20x = 807,005.70 × 520,216.20
  4. Step 4: Simplify right side
    537,712.20x = 419,817,438,632.34
  5. Step 5: Solve for x
    x = 419,817,438,632.34/537,712.20
  6. Step 6: Final answer
    x = 780,747.47

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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.