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Finding the Fourth Proportional to 537.60, 811.20 and 499.20

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Solution

The fourth proportional to 537.60, 811.20 and 499.20 is: 753.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.60 : 811.20 = 499.20 : x
  2. Step 2: Convert to fraction form
    537.60/811.20 = 499.20/x
  3. Step 3: Cross multiply
    537.60x = 811.20 × 499.20
  4. Step 4: Simplify right side
    537.60x = 404,951.04
  5. Step 5: Solve for x
    x = 404,951.04/537.60
  6. Step 6: Final answer
    x = 753.26

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.