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Finding the Fourth Proportional to 496.61, 742.69 and 442.10

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Solution

The fourth proportional to 496.61, 742.69 and 442.10 is: 661.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.61 : 742.69 = 442.10 : x
  2. Step 2: Convert to fraction form
    496.61/742.69 = 442.10/x
  3. Step 3: Cross multiply
    496.61x = 742.69 × 442.10
  4. Step 4: Simplify right side
    496.61x = 328,340.09
  5. Step 5: Solve for x
    x = 328,340.09/496.61
  6. Step 6: Final answer
    x = 661.16

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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.