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Finding the Fourth Proportional to 813.22, 1,122.76 and 626.36

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Solution

The fourth proportional to 813.22, 1,122.76 and 626.36 is: 864.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.22 : 1,122.76 = 626.36 : x
  2. Step 2: Convert to fraction form
    813.22/1,122.76 = 626.36/x
  3. Step 3: Cross multiply
    813.22x = 1,122.76 × 626.36
  4. Step 4: Simplify right side
    813.22x = 703,251.95
  5. Step 5: Solve for x
    x = 703,251.95/813.22
  6. Step 6: Final answer
    x = 864.77

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Half scale
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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.