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Finding the Fourth Proportional to 1,150.65, 1,587.90 and 626.68

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Solution

The fourth proportional to 1,150.65, 1,587.90 and 626.68 is: 864.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,150.65 : 1,587.90 = 626.68 : x
  2. Step 2: Convert to fraction form
    1,150.65/1,587.90 = 626.68/x
  3. Step 3: Cross multiply
    1,150.65x = 1,587.90 × 626.68
  4. Step 4: Simplify right side
    1,150.65x = 995,105.17
  5. Step 5: Solve for x
    x = 995,105.17/1,150.65
  6. Step 6: Final answer
    x = 864.82

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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.