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Finding the Fourth Proportional to 744.04, 1,026.90 and 685.48

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Solution

The fourth proportional to 744.04, 1,026.90 and 685.48 is: 946.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.04 : 1,026.90 = 685.48 : x
  2. Step 2: Convert to fraction form
    744.04/1,026.90 = 685.48/x
  3. Step 3: Cross multiply
    744.04x = 1,026.90 × 685.48
  4. Step 4: Simplify right side
    744.04x = 703,919.41
  5. Step 5: Solve for x
    x = 703,919.41/744.04
  6. Step 6: Final answer
    x = 946.08

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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.