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Finding the Fourth Proportional to 351.16, 525.78 and 272.80

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Solution

The fourth proportional to 351.16, 525.78 and 272.80 is: 408.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.16 : 525.78 = 272.80 : x
  2. Step 2: Convert to fraction form
    351.16/525.78 = 272.80/x
  3. Step 3: Cross multiply
    351.16x = 525.78 × 272.80
  4. Step 4: Simplify right side
    351.16x = 143,432.78
  5. Step 5: Solve for x
    x = 143,432.78/351.16
  6. Step 6: Final answer
    x = 408.45

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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.