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Finding the Fourth Proportional to 610.81, 842.92 and 470.68

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Solution

The fourth proportional to 610.81, 842.92 and 470.68 is: 649.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.81 : 842.92 = 470.68 : x
  2. Step 2: Convert to fraction form
    610.81/842.92 = 470.68/x
  3. Step 3: Cross multiply
    610.81x = 842.92 × 470.68
  4. Step 4: Simplify right side
    610.81x = 396,742.30
  5. Step 5: Solve for x
    x = 396,742.30/610.81
  6. Step 6: Final answer
    x = 649.54

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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.