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Finding the Fourth Proportional to 610.67, 842.85 and 386.46

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Solution

The fourth proportional to 610.67, 842.85 and 386.46 is: 533.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.67 : 842.85 = 386.46 : x
  2. Step 2: Convert to fraction form
    610.67/842.85 = 386.46/x
  3. Step 3: Cross multiply
    610.67x = 842.85 × 386.46
  4. Step 4: Simplify right side
    610.67x = 325,727.81
  5. Step 5: Solve for x
    x = 325,727.81/610.67
  6. Step 6: Final answer
    x = 533.39

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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.