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Finding the Fourth Proportional to 553.50, 763.92 and 320.76

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Solution

The fourth proportional to 553.50, 763.92 and 320.76 is: 442.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.50 : 763.92 = 320.76 : x
  2. Step 2: Convert to fraction form
    553.50/763.92 = 320.76/x
  3. Step 3: Cross multiply
    553.50x = 763.92 × 320.76
  4. Step 4: Simplify right side
    553.50x = 245,034.98
  5. Step 5: Solve for x
    x = 245,034.98/553.50
  6. Step 6: Final answer
    x = 442.70

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Find fourth proportional to 276.75, 381.96 and 160.38
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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.