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Finding the Fourth Proportional to 798.49, 1,199.55 and 689.14

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Solution

The fourth proportional to 798.49, 1,199.55 and 689.14 is: 1,035.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.49 : 1,199.55 = 689.14 : x
  2. Step 2: Convert to fraction form
    798.49/1,199.55 = 689.14/x
  3. Step 3: Cross multiply
    798.49x = 1,199.55 × 689.14
  4. Step 4: Simplify right side
    798.49x = 826,657.89
  5. Step 5: Solve for x
    x = 826,657.89/798.49
  6. Step 6: Final answer
    x = 1,035.28

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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.