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Finding the Fourth Proportional to 1,611.52, 2,418.72 and 1,248.64

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Solution

The fourth proportional to 1,611.52, 2,418.72 and 1,248.64 is: 1,874.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.52 : 2,418.72 = 1,248.64 : x
  2. Step 2: Convert to fraction form
    1,611.52/2,418.72 = 1,248.64/x
  3. Step 3: Cross multiply
    1,611.52x = 2,418.72 × 1,248.64
  4. Step 4: Simplify right side
    1,611.52x = 3,020,110.54
  5. Step 5: Solve for x
    x = 3,020,110.54/1,611.52
  6. Step 6: Final answer
    x = 1,874.08

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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.