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Finding the Fourth Proportional to 823.08, 1,137.42 and 626.22

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Solution

The fourth proportional to 823.08, 1,137.42 and 626.22 is: 865.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.08 : 1,137.42 = 626.22 : x
  2. Step 2: Convert to fraction form
    823.08/1,137.42 = 626.22/x
  3. Step 3: Cross multiply
    823.08x = 1,137.42 × 626.22
  4. Step 4: Simplify right side
    823.08x = 712,275.15
  5. Step 5: Solve for x
    x = 712,275.15/823.08
  6. Step 6: Final answer
    x = 865.38

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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.