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Finding the Fourth Proportional to 1,098.11, 1,515.39 and 626.00

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Solution

The fourth proportional to 1,098.11, 1,515.39 and 626.00 is: 863.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.11 : 1,515.39 = 626.00 : x
  2. Step 2: Convert to fraction form
    1,098.11/1,515.39 = 626.00/x
  3. Step 3: Cross multiply
    1,098.11x = 1,515.39 × 626.00
  4. Step 4: Simplify right side
    1,098.11x = 948,637.93
  5. Step 5: Solve for x
    x = 948,637.93/1,098.11
  6. Step 6: Final answer
    x = 863.88

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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.