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Finding the Fourth Proportional to 478.62, 660.90 and 463.14

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Solution

The fourth proportional to 478.62, 660.90 and 463.14 is: 639.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.62 : 660.90 = 463.14 : x
  2. Step 2: Convert to fraction form
    478.62/660.90 = 463.14/x
  3. Step 3: Cross multiply
    478.62x = 660.90 × 463.14
  4. Step 4: Simplify right side
    478.62x = 306,089.23
  5. Step 5: Solve for x
    x = 306,089.23/478.62
  6. Step 6: Final answer
    x = 639.52

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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.