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Finding the Fourth Proportional to 520,999.30, 781,520.55 and 166,003.30

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Solution

The fourth proportional to 520,999.30, 781,520.55 and 166,003.30 is: 249,011.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,999.30 : 781,520.55 = 166,003.30 : x
  2. Step 2: Convert to fraction form
    520,999.30/781,520.55 = 166,003.30/x
  3. Step 3: Cross multiply
    520,999.30x = 781,520.55 × 166,003.30
  4. Step 4: Simplify right side
    520,999.30x = 129,734,990,317.82
  5. Step 5: Solve for x
    x = 129,734,990,317.82/520,999.30
  6. Step 6: Final answer
    x = 249,011.83

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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.