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Finding the Fourth Proportional to 662.64, 915.16 and 442.52

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Solution

The fourth proportional to 662.64, 915.16 and 442.52 is: 611.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.64 : 915.16 = 442.52 : x
  2. Step 2: Convert to fraction form
    662.64/915.16 = 442.52/x
  3. Step 3: Cross multiply
    662.64x = 915.16 × 442.52
  4. Step 4: Simplify right side
    662.64x = 404,976.60
  5. Step 5: Solve for x
    x = 404,976.60/662.64
  6. Step 6: Final answer
    x = 611.16

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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.