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Finding the Fourth Proportional to 886.91, 1,330.41 and 338.99

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Solution

The fourth proportional to 886.91, 1,330.41 and 338.99 is: 508.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.91 : 1,330.41 = 338.99 : x
  2. Step 2: Convert to fraction form
    886.91/1,330.41 = 338.99/x
  3. Step 3: Cross multiply
    886.91x = 1,330.41 × 338.99
  4. Step 4: Simplify right side
    886.91x = 450,995.69
  5. Step 5: Solve for x
    x = 450,995.69/886.91
  6. Step 6: Final answer
    x = 508.50

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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.