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Finding the Fourth Proportional to 842.38, 1,162.82 and 723.89

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Solution

The fourth proportional to 842.38, 1,162.82 and 723.89 is: 999.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.38 : 1,162.82 = 723.89 : x
  2. Step 2: Convert to fraction form
    842.38/1,162.82 = 723.89/x
  3. Step 3: Cross multiply
    842.38x = 1,162.82 × 723.89
  4. Step 4: Simplify right side
    842.38x = 841,751.95
  5. Step 5: Solve for x
    x = 841,751.95/842.38
  6. Step 6: Final answer
    x = 999.25

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1.5x scale

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.