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Finding the Fourth Proportional to 510.77, 766.29 and 218.12

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Solution

The fourth proportional to 510.77, 766.29 and 218.12 is: 327.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.77 : 766.29 = 218.12 : x
  2. Step 2: Convert to fraction form
    510.77/766.29 = 218.12/x
  3. Step 3: Cross multiply
    510.77x = 766.29 × 218.12
  4. Step 4: Simplify right side
    510.77x = 167,139.34
  5. Step 5: Solve for x
    x = 167,139.34/510.77
  6. Step 6: Final answer
    x = 327.23

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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.