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Finding the Fourth Proportional to 802.82, 1,198.45 and 742.70

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Solution

The fourth proportional to 802.82, 1,198.45 and 742.70 is: 1,108.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.82 : 1,198.45 = 742.70 : x
  2. Step 2: Convert to fraction form
    802.82/1,198.45 = 742.70/x
  3. Step 3: Cross multiply
    802.82x = 1,198.45 × 742.70
  4. Step 4: Simplify right side
    802.82x = 890,085.10
  5. Step 5: Solve for x
    x = 890,085.10/802.82
  6. Step 6: Final answer
    x = 1,108.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.