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Finding the Fourth Proportional to 1,239.08, 1,708.65 and 1,062.65

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Solution

The fourth proportional to 1,239.08, 1,708.65 and 1,062.65 is: 1,465.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.08 : 1,708.65 = 1,062.65 : x
  2. Step 2: Convert to fraction form
    1,239.08/1,708.65 = 1,062.65/x
  3. Step 3: Cross multiply
    1,239.08x = 1,708.65 × 1,062.65
  4. Step 4: Simplify right side
    1,239.08x = 1,815,696.92
  5. Step 5: Solve for x
    x = 1,815,696.92/1,239.08
  6. Step 6: Final answer
    x = 1,465.36

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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.