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Finding the Fourth Proportional to 515.39, 773.12 and 190.98

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Solution

The fourth proportional to 515.39, 773.12 and 190.98 is: 286.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.39 : 773.12 = 190.98 : x
  2. Step 2: Convert to fraction form
    515.39/773.12 = 190.98/x
  3. Step 3: Cross multiply
    515.39x = 773.12 × 190.98
  4. Step 4: Simplify right side
    515.39x = 147,650.94
  5. Step 5: Solve for x
    x = 147,650.94/515.39
  6. Step 6: Final answer
    x = 286.49

Related Problems

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Half scale
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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.