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Finding the Fourth Proportional to 384.45, 576.66 and 124.47

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Solution

The fourth proportional to 384.45, 576.66 and 124.47 is: 186.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.45 : 576.66 = 124.47 : x
  2. Step 2: Convert to fraction form
    384.45/576.66 = 124.47/x
  3. Step 3: Cross multiply
    384.45x = 576.66 × 124.47
  4. Step 4: Simplify right side
    384.45x = 71,773.99
  5. Step 5: Solve for x
    x = 71,773.99/384.45
  6. Step 6: Final answer
    x = 186.70

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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.