Home / 1,166.90-1,610.30-635.78

Finding the Fourth Proportional to 1,166.90, 1,610.30 and 635.78

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Solution

The fourth proportional to 1,166.90, 1,610.30 and 635.78 is: 877.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,166.90 : 1,610.30 = 635.78 : x
  2. Step 2: Convert to fraction form
    1,166.90/1,610.30 = 635.78/x
  3. Step 3: Cross multiply
    1,166.90x = 1,610.30 × 635.78
  4. Step 4: Simplify right side
    1,166.90x = 1,023,792.67
  5. Step 5: Solve for x
    x = 1,023,792.67/1,166.90
  6. Step 6: Final answer
    x = 877.36

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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.