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Finding the Fourth Proportional to 610.40, 842.31 and 377.54

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Solution

The fourth proportional to 610.40, 842.31 and 377.54 is: 520.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.40 : 842.31 = 377.54 : x
  2. Step 2: Convert to fraction form
    610.40/842.31 = 377.54/x
  3. Step 3: Cross multiply
    610.40x = 842.31 × 377.54
  4. Step 4: Simplify right side
    610.40x = 318,005.72
  5. Step 5: Solve for x
    x = 318,005.72/610.40
  6. Step 6: Final answer
    x = 520.98

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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.