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Finding the Fourth Proportional to 518.75, 715.89 and 344.42

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Solution

The fourth proportional to 518.75, 715.89 and 344.42 is: 475.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.75 : 715.89 = 344.42 : x
  2. Step 2: Convert to fraction form
    518.75/715.89 = 344.42/x
  3. Step 3: Cross multiply
    518.75x = 715.89 × 344.42
  4. Step 4: Simplify right side
    518.75x = 246,566.83
  5. Step 5: Solve for x
    x = 246,566.83/518.75
  6. Step 6: Final answer
    x = 475.31

Related Problems

Find fourth proportional to 259.38, 357.95 and 172.21
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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.