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Finding the Fourth Proportional to 1,458.59, 2,013.09 and 869.47

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Solution

The fourth proportional to 1,458.59, 2,013.09 and 869.47 is: 1,200.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.59 : 2,013.09 = 869.47 : x
  2. Step 2: Convert to fraction form
    1,458.59/2,013.09 = 869.47/x
  3. Step 3: Cross multiply
    1,458.59x = 2,013.09 × 869.47
  4. Step 4: Simplify right side
    1,458.59x = 1,750,313.07
  5. Step 5: Solve for x
    x = 1,750,313.07/1,458.59
  6. Step 6: Final answer
    x = 1,200.01

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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.