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Finding the Fourth Proportional to 744.40, 990.73 and 744.40

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Solution

The fourth proportional to 744.40, 990.73 and 744.40 is: 990.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.40 : 990.73 = 744.40 : x
  2. Step 2: Convert to fraction form
    744.40/990.73 = 744.40/x
  3. Step 3: Cross multiply
    744.40x = 990.73 × 744.40
  4. Step 4: Simplify right side
    744.40x = 737,499.41
  5. Step 5: Solve for x
    x = 737,499.41/744.40
  6. Step 6: Final answer
    x = 990.73

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.