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Finding the Fourth Proportional to 805.66, 1,207.20 and 496.60

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Solution

The fourth proportional to 805.66, 1,207.20 and 496.60 is: 744.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.66 : 1,207.20 = 496.60 : x
  2. Step 2: Convert to fraction form
    805.66/1,207.20 = 496.60/x
  3. Step 3: Cross multiply
    805.66x = 1,207.20 × 496.60
  4. Step 4: Simplify right side
    805.66x = 599,495.52
  5. Step 5: Solve for x
    x = 599,495.52/805.66
  6. Step 6: Final answer
    x = 744.10

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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.