Home / 520,789.24-781,047.17-221,115.56

Finding the Fourth Proportional to 520,789.24, 781,047.17 and 221,115.56

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Solution

The fourth proportional to 520,789.24, 781,047.17 and 221,115.56 is: 331,615.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,789.24 : 781,047.17 = 221,115.56 : x
  2. Step 2: Convert to fraction form
    520,789.24/781,047.17 = 221,115.56/x
  3. Step 3: Cross multiply
    520,789.24x = 781,047.17 × 221,115.56
  4. Step 4: Simplify right side
    520,789.24x = 172,701,683,228.01
  5. Step 5: Solve for x
    x = 172,701,683,228.01/520,789.24
  6. Step 6: Final answer
    x = 331,615.31

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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.