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Finding the Fourth Proportional to 808.12, 1,114.74 and 512.92

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Solution

The fourth proportional to 808.12, 1,114.74 and 512.92 is: 707.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.12 : 1,114.74 = 512.92 : x
  2. Step 2: Convert to fraction form
    808.12/1,114.74 = 512.92/x
  3. Step 3: Cross multiply
    808.12x = 1,114.74 × 512.92
  4. Step 4: Simplify right side
    808.12x = 571,772.44
  5. Step 5: Solve for x
    x = 571,772.44/808.12
  6. Step 6: Final answer
    x = 707.53

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Double scale
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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.