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Finding the Fourth Proportional to 184.18, 253.83 and 128.77

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Solution

The fourth proportional to 184.18, 253.83 and 128.77 is: 177.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.18 : 253.83 = 128.77 : x
  2. Step 2: Convert to fraction form
    184.18/253.83 = 128.77/x
  3. Step 3: Cross multiply
    184.18x = 253.83 × 128.77
  4. Step 4: Simplify right side
    184.18x = 32,685.69
  5. Step 5: Solve for x
    x = 32,685.69/184.18
  6. Step 6: Final answer
    x = 177.47

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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.