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Finding the Fourth Proportional to 610.81, 842.88 and 345.27

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Solution

The fourth proportional to 610.81, 842.88 and 345.27 is: 476.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.81 : 842.88 = 345.27 : x
  2. Step 2: Convert to fraction form
    610.81/842.88 = 345.27/x
  3. Step 3: Cross multiply
    610.81x = 842.88 × 345.27
  4. Step 4: Simplify right side
    610.81x = 291,025.63
  5. Step 5: Solve for x
    x = 291,025.63/610.81
  6. Step 6: Final answer
    x = 476.46

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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.