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Finding the Fourth Proportional to 618.98, 854.24 and 370.31

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Solution

The fourth proportional to 618.98, 854.24 and 370.31 is: 511.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.98 : 854.24 = 370.31 : x
  2. Step 2: Convert to fraction form
    618.98/854.24 = 370.31/x
  3. Step 3: Cross multiply
    618.98x = 854.24 × 370.31
  4. Step 4: Simplify right side
    618.98x = 316,327.49
  5. Step 5: Solve for x
    x = 316,327.49/618.98
  6. Step 6: Final answer
    x = 511.05

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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.