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Finding the Fourth Proportional to 463.23, 639.45 and 418.77

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Solution

The fourth proportional to 463.23, 639.45 and 418.77 is: 578.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.23 : 639.45 = 418.77 : x
  2. Step 2: Convert to fraction form
    463.23/639.45 = 418.77/x
  3. Step 3: Cross multiply
    463.23x = 639.45 × 418.77
  4. Step 4: Simplify right side
    463.23x = 267,782.48
  5. Step 5: Solve for x
    x = 267,782.48/463.23
  6. Step 6: Final answer
    x = 578.08

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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.