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Finding the Fourth Proportional to 744.99, 1,112.40 and 635.64

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Solution

The fourth proportional to 744.99, 1,112.40 and 635.64 is: 949.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.99 : 1,112.40 = 635.64 : x
  2. Step 2: Convert to fraction form
    744.99/1,112.40 = 635.64/x
  3. Step 3: Cross multiply
    744.99x = 1,112.40 × 635.64
  4. Step 4: Simplify right side
    744.99x = 707,085.94
  5. Step 5: Solve for x
    x = 707,085.94/744.99
  6. Step 6: Final answer
    x = 949.12

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.