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Finding the Fourth Proportional to 659,620.90, 988,999.35 and 260,020.90

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Solution

The fourth proportional to 659,620.90, 988,999.35 and 260,020.90 is: 389,861.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,620.90 : 988,999.35 = 260,020.90 : x
  2. Step 2: Convert to fraction form
    659,620.90/988,999.35 = 260,020.90/x
  3. Step 3: Cross multiply
    659,620.90x = 988,999.35 × 260,020.90
  4. Step 4: Simplify right side
    659,620.90x = 257,160,501,086.42
  5. Step 5: Solve for x
    x = 257,160,501,086.42/659,620.90
  6. Step 6: Final answer
    x = 389,861.06

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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.