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Finding the Fourth Proportional to 744.80, 1,117.20 and 737.60

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Solution

The fourth proportional to 744.80, 1,117.20 and 737.60 is: 1,106.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.80 : 1,117.20 = 737.60 : x
  2. Step 2: Convert to fraction form
    744.80/1,117.20 = 737.60/x
  3. Step 3: Cross multiply
    744.80x = 1,117.20 × 737.60
  4. Step 4: Simplify right side
    744.80x = 824,046.72
  5. Step 5: Solve for x
    x = 824,046.72/744.80
  6. Step 6: Final answer
    x = 1,106.40

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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.