Home / 1,110.15-1,531.97-637.71

Finding the Fourth Proportional to 1,110.15, 1,531.97 and 637.71

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Solution

The fourth proportional to 1,110.15, 1,531.97 and 637.71 is: 880.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.15 : 1,531.97 = 637.71 : x
  2. Step 2: Convert to fraction form
    1,110.15/1,531.97 = 637.71/x
  3. Step 3: Cross multiply
    1,110.15x = 1,531.97 × 637.71
  4. Step 4: Simplify right side
    1,110.15x = 976,949.40
  5. Step 5: Solve for x
    x = 976,949.40/1,110.15
  6. Step 6: Final answer
    x = 880.02

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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.