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Finding the Fourth Proportional to 659,680.64, 988,905.36 and 260,324.72

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Solution

The fourth proportional to 659,680.64, 988,905.36 and 260,324.72 is: 390,244.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,680.64 : 988,905.36 = 260,324.72 : x
  2. Step 2: Convert to fraction form
    659,680.64/988,905.36 = 260,324.72/x
  3. Step 3: Cross multiply
    659,680.64x = 988,905.36 × 260,324.72
  4. Step 4: Simplify right side
    659,680.64x = 257,436,510,948.50
  5. Step 5: Solve for x
    x = 257,436,510,948.50/659,680.64
  6. Step 6: Final answer
    x = 390,244.15

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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.