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Finding the Fourth Proportional to 811.08, 1,119 and 456.94

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Solution

The fourth proportional to 811.08, 1,119 and 456.94 is: 630.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.08 : 1,119 = 456.94 : x
  2. Step 2: Convert to fraction form
    811.08/1,119 = 456.94/x
  3. Step 3: Cross multiply
    811.08x = 1,119 × 456.94
  4. Step 4: Simplify right side
    811.08x = 511,315.86
  5. Step 5: Solve for x
    x = 511,315.86/811.08
  6. Step 6: Final answer
    x = 630.41

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Double scale
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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.