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Finding the Fourth Proportional to 659,997.20, 988,246.20 and 520,029.20

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Solution

The fourth proportional to 659,997.20, 988,246.20 and 520,029.20 is: 778,665.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,997.20 : 988,246.20 = 520,029.20 : x
  2. Step 2: Convert to fraction form
    659,997.20/988,246.20 = 520,029.20/x
  3. Step 3: Cross multiply
    659,997.20x = 988,246.20 × 520,029.20
  4. Step 4: Simplify right side
    659,997.20x = 513,916,880,789.04
  5. Step 5: Solve for x
    x = 513,916,880,789.04/659,997.20
  6. Step 6: Final answer
    x = 778,665.24

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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.