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Finding the Fourth Proportional to 374.07, 561.20 and 117.57

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Solution

The fourth proportional to 374.07, 561.20 and 117.57 is: 176.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.07 : 561.20 = 117.57 : x
  2. Step 2: Convert to fraction form
    374.07/561.20 = 117.57/x
  3. Step 3: Cross multiply
    374.07x = 561.20 × 117.57
  4. Step 4: Simplify right side
    374.07x = 65,979.70
  5. Step 5: Solve for x
    x = 65,979.70/374.07
  6. Step 6: Final answer
    x = 176.38

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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.