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Finding the Fourth Proportional to 1,098.14, 1,515.57 and 626.20

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Solution

The fourth proportional to 1,098.14, 1,515.57 and 626.20 is: 864.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.14 : 1,515.57 = 626.20 : x
  2. Step 2: Convert to fraction form
    1,098.14/1,515.57 = 626.20/x
  3. Step 3: Cross multiply
    1,098.14x = 1,515.57 × 626.20
  4. Step 4: Simplify right side
    1,098.14x = 949,046.80
  5. Step 5: Solve for x
    x = 949,046.80/1,098.14
  6. Step 6: Final answer
    x = 864.24

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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.