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Finding the Fourth Proportional to 699.82, 1,048.50 and 517.57

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Solution

The fourth proportional to 699.82, 1,048.50 and 517.57 is: 775.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.82 : 1,048.50 = 517.57 : x
  2. Step 2: Convert to fraction form
    699.82/1,048.50 = 517.57/x
  3. Step 3: Cross multiply
    699.82x = 1,048.50 × 517.57
  4. Step 4: Simplify right side
    699.82x = 542,672.15
  5. Step 5: Solve for x
    x = 542,672.15/699.82
  6. Step 6: Final answer
    x = 775.45

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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.