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Finding the Fourth Proportional to 462.42, 638.15 and 275.92

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Solution

The fourth proportional to 462.42, 638.15 and 275.92 is: 380.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.42 : 638.15 = 275.92 : x
  2. Step 2: Convert to fraction form
    462.42/638.15 = 275.92/x
  3. Step 3: Cross multiply
    462.42x = 638.15 × 275.92
  4. Step 4: Simplify right side
    462.42x = 176,075.37
  5. Step 5: Solve for x
    x = 176,075.37/462.42
  6. Step 6: Final answer
    x = 380.77

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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.