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Finding the Fourth Proportional to 520.98, 781.26 and 228.48

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Solution

The fourth proportional to 520.98, 781.26 and 228.48 is: 342.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.98 : 781.26 = 228.48 : x
  2. Step 2: Convert to fraction form
    520.98/781.26 = 228.48/x
  3. Step 3: Cross multiply
    520.98x = 781.26 × 228.48
  4. Step 4: Simplify right side
    520.98x = 178,502.28
  5. Step 5: Solve for x
    x = 178,502.28/520.98
  6. Step 6: Final answer
    x = 342.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.