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Finding the Fourth Proportional to 867.92, 1,197.38 and 553.10

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Solution

The fourth proportional to 867.92, 1,197.38 and 553.10 is: 763.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.92 : 1,197.38 = 553.10 : x
  2. Step 2: Convert to fraction form
    867.92/1,197.38 = 553.10/x
  3. Step 3: Cross multiply
    867.92x = 1,197.38 × 553.10
  4. Step 4: Simplify right side
    867.92x = 662,262.13
  5. Step 5: Solve for x
    x = 662,262.13/867.92
  6. Step 6: Final answer
    x = 763.05

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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.