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Finding the Fourth Proportional to 806.55, 1,209.82 and 532.58

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Solution

The fourth proportional to 806.55, 1,209.82 and 532.58 is: 798.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.55 : 1,209.82 = 532.58 : x
  2. Step 2: Convert to fraction form
    806.55/1,209.82 = 532.58/x
  3. Step 3: Cross multiply
    806.55x = 1,209.82 × 532.58
  4. Step 4: Simplify right side
    806.55x = 644,320.55
  5. Step 5: Solve for x
    x = 644,320.55/806.55
  6. Step 6: Final answer
    x = 798.86

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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.