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Finding the Fourth Proportional to 819.01, 1,128.19 and 700.62

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Solution

The fourth proportional to 819.01, 1,128.19 and 700.62 is: 965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.01 : 1,128.19 = 700.62 : x
  2. Step 2: Convert to fraction form
    819.01/1,128.19 = 700.62/x
  3. Step 3: Cross multiply
    819.01x = 1,128.19 × 700.62
  4. Step 4: Simplify right side
    819.01x = 790,432.48
  5. Step 5: Solve for x
    x = 790,432.48/819.01
  6. Step 6: Final answer
    x = 965.11

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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.