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Finding the Fourth Proportional to 470.18, 648.72 and 271

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Solution

The fourth proportional to 470.18, 648.72 and 271 is: 373.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.18 : 648.72 = 271 : x
  2. Step 2: Convert to fraction form
    470.18/648.72 = 271/x
  3. Step 3: Cross multiply
    470.18x = 648.72 × 271
  4. Step 4: Simplify right side
    470.18x = 175,801.77
  5. Step 5: Solve for x
    x = 175,801.77/470.18
  6. Step 6: Final answer
    x = 373.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.