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Finding the Fourth Proportional to 549.48, 819.36 and 520.68

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Solution

The fourth proportional to 549.48, 819.36 and 520.68 is: 776.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.48 : 819.36 = 520.68 : x
  2. Step 2: Convert to fraction form
    549.48/819.36 = 520.68/x
  3. Step 3: Cross multiply
    549.48x = 819.36 × 520.68
  4. Step 4: Simplify right side
    549.48x = 426,624.36
  5. Step 5: Solve for x
    x = 426,624.36/549.48
  6. Step 6: Final answer
    x = 776.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.