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Finding the Fourth Proportional to 510.82, 766.28 and 218.35

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Solution

The fourth proportional to 510.82, 766.28 and 218.35 is: 327.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.82 : 766.28 = 218.35 : x
  2. Step 2: Convert to fraction form
    510.82/766.28 = 218.35/x
  3. Step 3: Cross multiply
    510.82x = 766.28 × 218.35
  4. Step 4: Simplify right side
    510.82x = 167,312.31
  5. Step 5: Solve for x
    x = 167,312.31/510.82
  6. Step 6: Final answer
    x = 327.54

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Double scale
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Similar ratio
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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.