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Finding the Fourth Proportional to 1,098.96, 1,515.96 and 867.12

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Solution

The fourth proportional to 1,098.96, 1,515.96 and 867.12 is: 1,196.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.96 : 1,515.96 = 867.12 : x
  2. Step 2: Convert to fraction form
    1,098.96/1,515.96 = 867.12/x
  3. Step 3: Cross multiply
    1,098.96x = 1,515.96 × 867.12
  4. Step 4: Simplify right side
    1,098.96x = 1,314,519.24
  5. Step 5: Solve for x
    x = 1,314,519.24/1,098.96
  6. Step 6: Final answer
    x = 1,196.15

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Double scale
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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.