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Finding the Fourth Proportional to 464.92, 643.38 and 402.76

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Solution

The fourth proportional to 464.92, 643.38 and 402.76 is: 557.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.92 : 643.38 = 402.76 : x
  2. Step 2: Convert to fraction form
    464.92/643.38 = 402.76/x
  3. Step 3: Cross multiply
    464.92x = 643.38 × 402.76
  4. Step 4: Simplify right side
    464.92x = 259,127.73
  5. Step 5: Solve for x
    x = 259,127.73/464.92
  6. Step 6: Final answer
    x = 557.36

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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.