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Finding the Fourth Proportional to 1,454.83, 2,007.65 and 865.35

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Solution

The fourth proportional to 1,454.83, 2,007.65 and 865.35 is: 1,194.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,454.83 : 2,007.65 = 865.35 : x
  2. Step 2: Convert to fraction form
    1,454.83/2,007.65 = 865.35/x
  3. Step 3: Cross multiply
    1,454.83x = 2,007.65 × 865.35
  4. Step 4: Simplify right side
    1,454.83x = 1,737,322.09
  5. Step 5: Solve for x
    x = 1,737,322.09/1,454.83
  6. Step 6: Final answer
    x = 1,194.18

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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.