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Finding the Fourth Proportional to 1,157.06, 1,736.40 and 915.14

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Solution

The fourth proportional to 1,157.06, 1,736.40 and 915.14 is: 1,373.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.06 : 1,736.40 = 915.14 : x
  2. Step 2: Convert to fraction form
    1,157.06/1,736.40 = 915.14/x
  3. Step 3: Cross multiply
    1,157.06x = 1,736.40 × 915.14
  4. Step 4: Simplify right side
    1,157.06x = 1,589,049.10
  5. Step 5: Solve for x
    x = 1,589,049.10/1,157.06
  6. Step 6: Final answer
    x = 1,373.35

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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.