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Finding the Fourth Proportional to 442.92, 661.26 and 403.95

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Solution

The fourth proportional to 442.92, 661.26 and 403.95 is: 603.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.92 : 661.26 = 403.95 : x
  2. Step 2: Convert to fraction form
    442.92/661.26 = 403.95/x
  3. Step 3: Cross multiply
    442.92x = 661.26 × 403.95
  4. Step 4: Simplify right side
    442.92x = 267,115.98
  5. Step 5: Solve for x
    x = 267,115.98/442.92
  6. Step 6: Final answer
    x = 603.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.