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Finding the Fourth Proportional to 639.08, 956.76 and 477.44

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Solution

The fourth proportional to 639.08, 956.76 and 477.44 is: 714.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.08 : 956.76 = 477.44 : x
  2. Step 2: Convert to fraction form
    639.08/956.76 = 477.44/x
  3. Step 3: Cross multiply
    639.08x = 956.76 × 477.44
  4. Step 4: Simplify right side
    639.08x = 456,795.49
  5. Step 5: Solve for x
    x = 456,795.49/639.08
  6. Step 6: Final answer
    x = 714.77

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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.