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Finding the Fourth Proportional to 806.55, 1,208.82 and 460.17

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Solution

The fourth proportional to 806.55, 1,208.82 and 460.17 is: 689.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.55 : 1,208.82 = 460.17 : x
  2. Step 2: Convert to fraction form
    806.55/1,208.82 = 460.17/x
  3. Step 3: Cross multiply
    806.55x = 1,208.82 × 460.17
  4. Step 4: Simplify right side
    806.55x = 556,262.70
  5. Step 5: Solve for x
    x = 556,262.70/806.55
  6. Step 6: Final answer
    x = 689.68

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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.