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Finding the Fourth Proportional to 1,153.32, 1,731.18 and 667.32

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Solution

The fourth proportional to 1,153.32, 1,731.18 and 667.32 is: 1,001.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.32 : 1,731.18 = 667.32 : x
  2. Step 2: Convert to fraction form
    1,153.32/1,731.18 = 667.32/x
  3. Step 3: Cross multiply
    1,153.32x = 1,731.18 × 667.32
  4. Step 4: Simplify right side
    1,153.32x = 1,155,251.04
  5. Step 5: Solve for x
    x = 1,155,251.04/1,153.32
  6. Step 6: Final answer
    x = 1,001.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.