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Finding the Fourth Proportional to 374.78, 562.14 and 319.41

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Solution

The fourth proportional to 374.78, 562.14 and 319.41 is: 479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.78 : 562.14 = 319.41 : x
  2. Step 2: Convert to fraction form
    374.78/562.14 = 319.41/x
  3. Step 3: Cross multiply
    374.78x = 562.14 × 319.41
  4. Step 4: Simplify right side
    374.78x = 179,553.14
  5. Step 5: Solve for x
    x = 179,553.14/374.78
  6. Step 6: Final answer
    x = 479.10

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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.