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Finding the Fourth Proportional to 744.26, 1,116.40 and 435.48

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Solution

The fourth proportional to 744.26, 1,116.40 and 435.48 is: 653.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.26 : 1,116.40 = 435.48 : x
  2. Step 2: Convert to fraction form
    744.26/1,116.40 = 435.48/x
  3. Step 3: Cross multiply
    744.26x = 1,116.40 × 435.48
  4. Step 4: Simplify right side
    744.26x = 486,169.87
  5. Step 5: Solve for x
    x = 486,169.87/744.26
  6. Step 6: Final answer
    x = 653.23

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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.