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Finding the Fourth Proportional to 519.40, 779.24 and 432.26

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Solution

The fourth proportional to 519.40, 779.24 and 432.26 is: 648.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.40 : 779.24 = 432.26 : x
  2. Step 2: Convert to fraction form
    519.40/779.24 = 432.26/x
  3. Step 3: Cross multiply
    519.40x = 779.24 × 432.26
  4. Step 4: Simplify right side
    519.40x = 336,832.12
  5. Step 5: Solve for x
    x = 336,832.12/519.40
  6. Step 6: Final answer
    x = 648.51

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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.