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Finding the Fourth Proportional to 659,747.70, 989,427.15 and 260,255.70

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Solution

The fourth proportional to 659,747.70, 989,427.15 and 260,255.70 is: 390,306.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,747.70 : 989,427.15 = 260,255.70 : x
  2. Step 2: Convert to fraction form
    659,747.70/989,427.15 = 260,255.70/x
  3. Step 3: Cross multiply
    659,747.70x = 989,427.15 × 260,255.70
  4. Step 4: Simplify right side
    659,747.70x = 257,504,055,522.26
  5. Step 5: Solve for x
    x = 257,504,055,522.26/659,747.70
  6. Step 6: Final answer
    x = 390,306.86

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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.