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Finding the Fourth Proportional to 1,337.12, 1,845.60 and 839.60

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Solution

The fourth proportional to 1,337.12, 1,845.60 and 839.60 is: 1,158.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,337.12 : 1,845.60 = 839.60 : x
  2. Step 2: Convert to fraction form
    1,337.12/1,845.60 = 839.60/x
  3. Step 3: Cross multiply
    1,337.12x = 1,845.60 × 839.60
  4. Step 4: Simplify right side
    1,337.12x = 1,549,565.76
  5. Step 5: Solve for x
    x = 1,549,565.76/1,337.12
  6. Step 6: Final answer
    x = 1,158.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.