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Finding the Fourth Proportional to 618.88, 854.05 and 342.88

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Solution

The fourth proportional to 618.88, 854.05 and 342.88 is: 473.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.88 : 854.05 = 342.88 : x
  2. Step 2: Convert to fraction form
    618.88/854.05 = 342.88/x
  3. Step 3: Cross multiply
    618.88x = 854.05 × 342.88
  4. Step 4: Simplify right side
    618.88x = 292,836.66
  5. Step 5: Solve for x
    x = 292,836.66/618.88
  6. Step 6: Final answer
    x = 473.17

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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.