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Finding the Fourth Proportional to 515.67, 772.26 and 272.04

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Solution

The fourth proportional to 515.67, 772.26 and 272.04 is: 407.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.67 : 772.26 = 272.04 : x
  2. Step 2: Convert to fraction form
    515.67/772.26 = 272.04/x
  3. Step 3: Cross multiply
    515.67x = 772.26 × 272.04
  4. Step 4: Simplify right side
    515.67x = 210,085.61
  5. Step 5: Solve for x
    x = 210,085.61/515.67
  6. Step 6: Final answer
    x = 407.40

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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.