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Finding the Fourth Proportional to 504.80, 757.20 and 274.40

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Solution

The fourth proportional to 504.80, 757.20 and 274.40 is: 411.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.80 : 757.20 = 274.40 : x
  2. Step 2: Convert to fraction form
    504.80/757.20 = 274.40/x
  3. Step 3: Cross multiply
    504.80x = 757.20 × 274.40
  4. Step 4: Simplify right side
    504.80x = 207,775.68
  5. Step 5: Solve for x
    x = 207,775.68/504.80
  6. Step 6: Final answer
    x = 411.60

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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.