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Finding the Fourth Proportional to 184.42, 254.41 and 128.40

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Solution

The fourth proportional to 184.42, 254.41 and 128.40 is: 177.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.42 : 254.41 = 128.40 : x
  2. Step 2: Convert to fraction form
    184.42/254.41 = 128.40/x
  3. Step 3: Cross multiply
    184.42x = 254.41 × 128.40
  4. Step 4: Simplify right side
    184.42x = 32,666.24
  5. Step 5: Solve for x
    x = 32,666.24/184.42
  6. Step 6: Final answer
    x = 177.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.