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Finding the Fourth Proportional to 518.49, 777.15 and 345.27

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Solution

The fourth proportional to 518.49, 777.15 and 345.27 is: 517.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.49 : 777.15 = 345.27 : x
  2. Step 2: Convert to fraction form
    518.49/777.15 = 345.27/x
  3. Step 3: Cross multiply
    518.49x = 777.15 × 345.27
  4. Step 4: Simplify right side
    518.49x = 268,326.58
  5. Step 5: Solve for x
    x = 268,326.58/518.49
  6. Step 6: Final answer
    x = 517.52

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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.