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Finding the Fourth Proportional to 462.30, 637.80 and 275.76

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Solution

The fourth proportional to 462.30, 637.80 and 275.76 is: 380.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.30 : 637.80 = 275.76 : x
  2. Step 2: Convert to fraction form
    462.30/637.80 = 275.76/x
  3. Step 3: Cross multiply
    462.30x = 637.80 × 275.76
  4. Step 4: Simplify right side
    462.30x = 175,879.73
  5. Step 5: Solve for x
    x = 175,879.73/462.30
  6. Step 6: Final answer
    x = 380.45

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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.