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Finding the Fourth Proportional to 374.43, 561.65 and 100.55

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Solution

The fourth proportional to 374.43, 561.65 and 100.55 is: 150.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.43 : 561.65 = 100.55 : x
  2. Step 2: Convert to fraction form
    374.43/561.65 = 100.55/x
  3. Step 3: Cross multiply
    374.43x = 561.65 × 100.55
  4. Step 4: Simplify right side
    374.43x = 56,471.10
  5. Step 5: Solve for x
    x = 56,471.10/374.43
  6. Step 6: Final answer
    x = 150.82

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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.