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Finding the Fourth Proportional to 1,292.42, 1,937.82 and 880.30

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Solution

The fourth proportional to 1,292.42, 1,937.82 and 880.30 is: 1,319.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.42 : 1,937.82 = 880.30 : x
  2. Step 2: Convert to fraction form
    1,292.42/1,937.82 = 880.30/x
  3. Step 3: Cross multiply
    1,292.42x = 1,937.82 × 880.30
  4. Step 4: Simplify right side
    1,292.42x = 1,705,862.95
  5. Step 5: Solve for x
    x = 1,705,862.95/1,292.42
  6. Step 6: Final answer
    x = 1,319.90

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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.