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Finding the Fourth Proportional to 1,253.52, 1,876.68 and 841.56

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Solution

The fourth proportional to 1,253.52, 1,876.68 and 841.56 is: 1,259.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.52 : 1,876.68 = 841.56 : x
  2. Step 2: Convert to fraction form
    1,253.52/1,876.68 = 841.56/x
  3. Step 3: Cross multiply
    1,253.52x = 1,876.68 × 841.56
  4. Step 4: Simplify right side
    1,253.52x = 1,579,338.82
  5. Step 5: Solve for x
    x = 1,579,338.82/1,253.52
  6. Step 6: Final answer
    x = 1,259.92

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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.