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Finding the Fourth Proportional to 744.70, 1,028.04 and 578.52

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Solution

The fourth proportional to 744.70, 1,028.04 and 578.52 is: 798.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.70 : 1,028.04 = 578.52 : x
  2. Step 2: Convert to fraction form
    744.70/1,028.04 = 578.52/x
  3. Step 3: Cross multiply
    744.70x = 1,028.04 × 578.52
  4. Step 4: Simplify right side
    744.70x = 594,741.70
  5. Step 5: Solve for x
    x = 594,741.70/744.70
  6. Step 6: Final answer
    x = 798.63

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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.