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Finding the Fourth Proportional to 515.10, 772.44 and 190.28

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Solution

The fourth proportional to 515.10, 772.44 and 190.28 is: 285.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.10 : 772.44 = 190.28 : x
  2. Step 2: Convert to fraction form
    515.10/772.44 = 190.28/x
  3. Step 3: Cross multiply
    515.10x = 772.44 × 190.28
  4. Step 4: Simplify right side
    515.10x = 146,979.88
  5. Step 5: Solve for x
    x = 146,979.88/515.10
  6. Step 6: Final answer
    x = 285.34

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Double scale
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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.