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Finding the Fourth Proportional to 618.95, 928.15 and 186.02

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Solution

The fourth proportional to 618.95, 928.15 and 186.02 is: 278.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.95 : 928.15 = 186.02 : x
  2. Step 2: Convert to fraction form
    618.95/928.15 = 186.02/x
  3. Step 3: Cross multiply
    618.95x = 928.15 × 186.02
  4. Step 4: Simplify right side
    618.95x = 172,654.46
  5. Step 5: Solve for x
    x = 172,654.46/618.95
  6. Step 6: Final answer
    x = 278.95

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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.