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Finding the Fourth Proportional to 446.60, 669.82 and 424.66

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Solution

The fourth proportional to 446.60, 669.82 and 424.66 is: 636.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.60 : 669.82 = 424.66 : x
  2. Step 2: Convert to fraction form
    446.60/669.82 = 424.66/x
  3. Step 3: Cross multiply
    446.60x = 669.82 × 424.66
  4. Step 4: Simplify right side
    446.60x = 284,445.76
  5. Step 5: Solve for x
    x = 284,445.76/446.60
  6. Step 6: Final answer
    x = 636.91

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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.