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Finding the Fourth Proportional to 1,609.32, 2,415.60 and 915.96

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Solution

The fourth proportional to 1,609.32, 2,415.60 and 915.96 is: 1,374.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.32 : 2,415.60 = 915.96 : x
  2. Step 2: Convert to fraction form
    1,609.32/2,415.60 = 915.96/x
  3. Step 3: Cross multiply
    1,609.32x = 2,415.60 × 915.96
  4. Step 4: Simplify right side
    1,609.32x = 2,212,592.98
  5. Step 5: Solve for x
    x = 2,212,592.98/1,609.32
  6. Step 6: Final answer
    x = 1,374.86

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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.