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Finding the Fourth Proportional to 659,446.10, 989,497.20 and 260,099.90

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Solution

The fourth proportional to 659,446.10, 989,497.20 and 260,099.90 is: 390,279.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,446.10 : 989,497.20 = 260,099.90 : x
  2. Step 2: Convert to fraction form
    659,446.10/989,497.20 = 260,099.90/x
  3. Step 3: Cross multiply
    659,446.10x = 989,497.20 × 260,099.90
  4. Step 4: Simplify right side
    659,446.10x = 257,368,122,770.28
  5. Step 5: Solve for x
    x = 257,368,122,770.28/659,446.10
  6. Step 6: Final answer
    x = 390,279.24

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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.