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Finding the Fourth Proportional to 510.15, 764.82 and 217.56

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Solution

The fourth proportional to 510.15, 764.82 and 217.56 is: 326.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.15 : 764.82 = 217.56 : x
  2. Step 2: Convert to fraction form
    510.15/764.82 = 217.56/x
  3. Step 3: Cross multiply
    510.15x = 764.82 × 217.56
  4. Step 4: Simplify right side
    510.15x = 166,394.24
  5. Step 5: Solve for x
    x = 166,394.24/510.15
  6. Step 6: Final answer
    x = 326.17

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1.5x scale

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.