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Finding the Fourth Proportional to 748.10, 1,117.26 and 626.46

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Solution

The fourth proportional to 748.10, 1,117.26 and 626.46 is: 935.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.10 : 1,117.26 = 626.46 : x
  2. Step 2: Convert to fraction form
    748.10/1,117.26 = 626.46/x
  3. Step 3: Cross multiply
    748.10x = 1,117.26 × 626.46
  4. Step 4: Simplify right side
    748.10x = 699,918.70
  5. Step 5: Solve for x
    x = 699,918.70/748.10
  6. Step 6: Final answer
    x = 935.60

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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.