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Finding the Fourth Proportional to 1,165.39, 1,609.27 and 724.04

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Solution

The fourth proportional to 1,165.39, 1,609.27 and 724.04 is: 999.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.39 : 1,609.27 = 724.04 : x
  2. Step 2: Convert to fraction form
    1,165.39/1,609.27 = 724.04/x
  3. Step 3: Cross multiply
    1,165.39x = 1,609.27 × 724.04
  4. Step 4: Simplify right side
    1,165.39x = 1,165,172.03
  5. Step 5: Solve for x
    x = 1,165,172.03/1,165.39
  6. Step 6: Final answer
    x = 999.82

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1.5x scale

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.