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Finding the Fourth Proportional to 1,458.78, 2,013.14 and 869.66

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Solution

The fourth proportional to 1,458.78, 2,013.14 and 869.66 is: 1,200.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.78 : 2,013.14 = 869.66 : x
  2. Step 2: Convert to fraction form
    1,458.78/2,013.14 = 869.66/x
  3. Step 3: Cross multiply
    1,458.78x = 2,013.14 × 869.66
  4. Step 4: Simplify right side
    1,458.78x = 1,750,732.92
  5. Step 5: Solve for x
    x = 1,750,732.92/1,458.78
  6. Step 6: Final answer
    x = 1,200.13

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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.