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Finding the Fourth Proportional to 922.72, 1,273.38 and 628.12

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Solution

The fourth proportional to 922.72, 1,273.38 and 628.12 is: 866.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.72 : 1,273.38 = 628.12 : x
  2. Step 2: Convert to fraction form
    922.72/1,273.38 = 628.12/x
  3. Step 3: Cross multiply
    922.72x = 1,273.38 × 628.12
  4. Step 4: Simplify right side
    922.72x = 799,835.45
  5. Step 5: Solve for x
    x = 799,835.45/922.72
  6. Step 6: Final answer
    x = 866.82

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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.