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Finding the Fourth Proportional to 382.74, 572.85 and 274.20

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Solution

The fourth proportional to 382.74, 572.85 and 274.20 is: 410.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.74 : 572.85 = 274.20 : x
  2. Step 2: Convert to fraction form
    382.74/572.85 = 274.20/x
  3. Step 3: Cross multiply
    382.74x = 572.85 × 274.20
  4. Step 4: Simplify right side
    382.74x = 157,075.47
  5. Step 5: Solve for x
    x = 157,075.47/382.74
  6. Step 6: Final answer
    x = 410.40

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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.