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Finding the Fourth Proportional to 559.43, 772.17 and 393.68

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Solution

The fourth proportional to 559.43, 772.17 and 393.68 is: 543.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.43 : 772.17 = 393.68 : x
  2. Step 2: Convert to fraction form
    559.43/772.17 = 393.68/x
  3. Step 3: Cross multiply
    559.43x = 772.17 × 393.68
  4. Step 4: Simplify right side
    559.43x = 303,987.89
  5. Step 5: Solve for x
    x = 303,987.89/559.43
  6. Step 6: Final answer
    x = 543.39

Related Problems

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.