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Finding the Fourth Proportional to 807.32, 1,113.80 and 571.68

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Solution

The fourth proportional to 807.32, 1,113.80 and 571.68 is: 788.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.32 : 1,113.80 = 571.68 : x
  2. Step 2: Convert to fraction form
    807.32/1,113.80 = 571.68/x
  3. Step 3: Cross multiply
    807.32x = 1,113.80 × 571.68
  4. Step 4: Simplify right side
    807.32x = 636,734.33
  5. Step 5: Solve for x
    x = 636,734.33/807.32
  6. Step 6: Final answer
    x = 788.71

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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.