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Finding the Fourth Proportional to 1,253.76, 1,877.28 and 766.08

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Solution

The fourth proportional to 1,253.76, 1,877.28 and 766.08 is: 1,147.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.76 : 1,877.28 = 766.08 : x
  2. Step 2: Convert to fraction form
    1,253.76/1,877.28 = 766.08/x
  3. Step 3: Cross multiply
    1,253.76x = 1,877.28 × 766.08
  4. Step 4: Simplify right side
    1,253.76x = 1,438,146.66
  5. Step 5: Solve for x
    x = 1,438,146.66/1,253.76
  6. Step 6: Final answer
    x = 1,147.07

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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.