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Finding the Fourth Proportional to 374.50, 561.78 and 118

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Solution

The fourth proportional to 374.50, 561.78 and 118 is: 177.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.50 : 561.78 = 118 : x
  2. Step 2: Convert to fraction form
    374.50/561.78 = 118/x
  3. Step 3: Cross multiply
    374.50x = 561.78 × 118
  4. Step 4: Simplify right side
    374.50x = 66,290.04
  5. Step 5: Solve for x
    x = 66,290.04/374.50
  6. Step 6: Final answer
    x = 177.01

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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.