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Finding the Fourth Proportional to 1,146.36, 1,717.22 and 915.64

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Solution

The fourth proportional to 1,146.36, 1,717.22 and 915.64 is: 1,371.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.36 : 1,717.22 = 915.64 : x
  2. Step 2: Convert to fraction form
    1,146.36/1,717.22 = 915.64/x
  3. Step 3: Cross multiply
    1,146.36x = 1,717.22 × 915.64
  4. Step 4: Simplify right side
    1,146.36x = 1,572,355.32
  5. Step 5: Solve for x
    x = 1,572,355.32/1,146.36
  6. Step 6: Final answer
    x = 1,371.61

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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.