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Finding the Fourth Proportional to 610.36, 842.42 and 386.15

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Solution

The fourth proportional to 610.36, 842.42 and 386.15 is: 532.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.36 : 842.42 = 386.15 : x
  2. Step 2: Convert to fraction form
    610.36/842.42 = 386.15/x
  3. Step 3: Cross multiply
    610.36x = 842.42 × 386.15
  4. Step 4: Simplify right side
    610.36x = 325,300.48
  5. Step 5: Solve for x
    x = 325,300.48/610.36
  6. Step 6: Final answer
    x = 532.96

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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.