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Finding the Fourth Proportional to 610.34, 842.74 and 400.66

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Solution

The fourth proportional to 610.34, 842.74 and 400.66 is: 553.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.34 : 842.74 = 400.66 : x
  2. Step 2: Convert to fraction form
    610.34/842.74 = 400.66/x
  3. Step 3: Cross multiply
    610.34x = 842.74 × 400.66
  4. Step 4: Simplify right side
    610.34x = 337,652.21
  5. Step 5: Solve for x
    x = 337,652.21/610.34
  6. Step 6: Final answer
    x = 553.22

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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.