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Finding the Fourth Proportional to 1,458.97, 2,013.57 and 869.50

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Solution

The fourth proportional to 1,458.97, 2,013.57 and 869.50 is: 1,200.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.97 : 2,013.57 = 869.50 : x
  2. Step 2: Convert to fraction form
    1,458.97/2,013.57 = 869.50/x
  3. Step 3: Cross multiply
    1,458.97x = 2,013.57 × 869.50
  4. Step 4: Simplify right side
    1,458.97x = 1,750,799.12
  5. Step 5: Solve for x
    x = 1,750,799.12/1,458.97
  6. Step 6: Final answer
    x = 1,200.02

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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.