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Finding the Fourth Proportional to 842.63, 1,263.45 and 740.12

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Solution

The fourth proportional to 842.63, 1,263.45 and 740.12 is: 1,109.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.63 : 1,263.45 = 740.12 : x
  2. Step 2: Convert to fraction form
    842.63/1,263.45 = 740.12/x
  3. Step 3: Cross multiply
    842.63x = 1,263.45 × 740.12
  4. Step 4: Simplify right side
    842.63x = 935,104.61
  5. Step 5: Solve for x
    x = 935,104.61/842.63
  6. Step 6: Final answer
    x = 1,109.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.