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Finding the Fourth Proportional to 822.38, 1,134.35 and 553.65

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Solution

The fourth proportional to 822.38, 1,134.35 and 553.65 is: 763.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.38 : 1,134.35 = 553.65 : x
  2. Step 2: Convert to fraction form
    822.38/1,134.35 = 553.65/x
  3. Step 3: Cross multiply
    822.38x = 1,134.35 × 553.65
  4. Step 4: Simplify right side
    822.38x = 628,027.21
  5. Step 5: Solve for x
    x = 628,027.21/822.38
  6. Step 6: Final answer
    x = 763.67

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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.