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Finding the Fourth Proportional to 520,791.24, 781,050.16 and 221,117.56

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Solution

The fourth proportional to 520,791.24, 781,050.16 and 221,117.56 is: 331,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,791.24 : 781,050.16 = 221,117.56 : x
  2. Step 2: Convert to fraction form
    520,791.24/781,050.16 = 221,117.56/x
  3. Step 3: Cross multiply
    520,791.24x = 781,050.16 × 221,117.56
  4. Step 4: Simplify right side
    520,791.24x = 172,703,905,616.81
  5. Step 5: Solve for x
    x = 172,703,905,616.81/520,791.24
  6. Step 6: Final answer
    x = 331,618.30

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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.