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Finding the Fourth Proportional to 402.16, 603.60 and 274

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Solution

The fourth proportional to 402.16, 603.60 and 274 is: 411.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.16 : 603.60 = 274 : x
  2. Step 2: Convert to fraction form
    402.16/603.60 = 274/x
  3. Step 3: Cross multiply
    402.16x = 603.60 × 274
  4. Step 4: Simplify right side
    402.16x = 165,386.40
  5. Step 5: Solve for x
    x = 165,386.40/402.16
  6. Step 6: Final answer
    x = 411.25

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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.