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Finding the Fourth Proportional to 1,160.90, 1,601.77 and 663.26

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Solution

The fourth proportional to 1,160.90, 1,601.77 and 663.26 is: 915.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,160.90 : 1,601.77 = 663.26 : x
  2. Step 2: Convert to fraction form
    1,160.90/1,601.77 = 663.26/x
  3. Step 3: Cross multiply
    1,160.90x = 1,601.77 × 663.26
  4. Step 4: Simplify right side
    1,160.90x = 1,062,389.97
  5. Step 5: Solve for x
    x = 1,062,389.97/1,160.90
  6. Step 6: Final answer
    x = 915.14

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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.