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Finding the Fourth Proportional to 278.58, 418.02 and 124.47

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Solution

The fourth proportional to 278.58, 418.02 and 124.47 is: 186.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.58 : 418.02 = 124.47 : x
  2. Step 2: Convert to fraction form
    278.58/418.02 = 124.47/x
  3. Step 3: Cross multiply
    278.58x = 418.02 × 124.47
  4. Step 4: Simplify right side
    278.58x = 52,030.95
  5. Step 5: Solve for x
    x = 52,030.95/278.58
  6. Step 6: Final answer
    x = 186.77

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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.