Home / 1,110.10-1,531.90-667.92

Finding the Fourth Proportional to 1,110.10, 1,531.90 and 667.92

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Solution

The fourth proportional to 1,110.10, 1,531.90 and 667.92 is: 921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.10 : 1,531.90 = 667.92 : x
  2. Step 2: Convert to fraction form
    1,110.10/1,531.90 = 667.92/x
  3. Step 3: Cross multiply
    1,110.10x = 1,531.90 × 667.92
  4. Step 4: Simplify right side
    1,110.10x = 1,023,184.19
  5. Step 5: Solve for x
    x = 1,023,184.19/1,110.10
  6. Step 6: Final answer
    x = 921.70

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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.