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Finding the Fourth Proportional to 520.16, 778.95 and 314.82

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Solution

The fourth proportional to 520.16, 778.95 and 314.82 is: 471.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.16 : 778.95 = 314.82 : x
  2. Step 2: Convert to fraction form
    520.16/778.95 = 314.82/x
  3. Step 3: Cross multiply
    520.16x = 778.95 × 314.82
  4. Step 4: Simplify right side
    520.16x = 245,229.04
  5. Step 5: Solve for x
    x = 245,229.04/520.16
  6. Step 6: Final answer
    x = 471.45

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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.