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Finding the Fourth Proportional to 374.49, 557.48 and 356.80

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Solution

The fourth proportional to 374.49, 557.48 and 356.80 is: 531.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.49 : 557.48 = 356.80 : x
  2. Step 2: Convert to fraction form
    374.49/557.48 = 356.80/x
  3. Step 3: Cross multiply
    374.49x = 557.48 × 356.80
  4. Step 4: Simplify right side
    374.49x = 198,908.86
  5. Step 5: Solve for x
    x = 198,908.86/374.49
  6. Step 6: Final answer
    x = 531.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.