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Finding the Fourth Proportional to 744.74, 1,026.36 and 626.75

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Solution

The fourth proportional to 744.74, 1,026.36 and 626.75 is: 863.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.74 : 1,026.36 = 626.75 : x
  2. Step 2: Convert to fraction form
    744.74/1,026.36 = 626.75/x
  3. Step 3: Cross multiply
    744.74x = 1,026.36 × 626.75
  4. Step 4: Simplify right side
    744.74x = 643,266.00
  5. Step 5: Solve for x
    x = 643,266.00/744.74
  6. Step 6: Final answer
    x = 863.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.