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Finding the Fourth Proportional to 1,052.91, 1,449.32 and 928.89

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Solution

The fourth proportional to 1,052.91, 1,449.32 and 928.89 is: 1,278.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.91 : 1,449.32 = 928.89 : x
  2. Step 2: Convert to fraction form
    1,052.91/1,449.32 = 928.89/x
  3. Step 3: Cross multiply
    1,052.91x = 1,449.32 × 928.89
  4. Step 4: Simplify right side
    1,052.91x = 1,346,254.21
  5. Step 5: Solve for x
    x = 1,346,254.21/1,052.91
  6. Step 6: Final answer
    x = 1,278.60

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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.