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Finding the Fourth Proportional to 374.96, 561.90 and 158.70

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Solution

The fourth proportional to 374.96, 561.90 and 158.70 is: 237.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.96 : 561.90 = 158.70 : x
  2. Step 2: Convert to fraction form
    374.96/561.90 = 158.70/x
  3. Step 3: Cross multiply
    374.96x = 561.90 × 158.70
  4. Step 4: Simplify right side
    374.96x = 89,173.53
  5. Step 5: Solve for x
    x = 89,173.53/374.96
  6. Step 6: Final answer
    x = 237.82

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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.