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Finding the Fourth Proportional to 749.44, 1,122.94 and 646.47

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Solution

The fourth proportional to 749.44, 1,122.94 and 646.47 is: 968.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.44 : 1,122.94 = 646.47 : x
  2. Step 2: Convert to fraction form
    749.44/1,122.94 = 646.47/x
  3. Step 3: Cross multiply
    749.44x = 1,122.94 × 646.47
  4. Step 4: Simplify right side
    749.44x = 725,947.02
  5. Step 5: Solve for x
    x = 725,947.02/749.44
  6. Step 6: Final answer
    x = 968.65

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.