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Finding the Fourth Proportional to 618.95, 854.12 and 339.17

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Solution

The fourth proportional to 618.95, 854.12 and 339.17 is: 468.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.95 : 854.12 = 339.17 : x
  2. Step 2: Convert to fraction form
    618.95/854.12 = 339.17/x
  3. Step 3: Cross multiply
    618.95x = 854.12 × 339.17
  4. Step 4: Simplify right side
    618.95x = 289,694.86
  5. Step 5: Solve for x
    x = 289,694.86/618.95
  6. Step 6: Final answer
    x = 468.05

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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.