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Finding the Fourth Proportional to 744.28, 1,027.11 and 412.74

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Solution

The fourth proportional to 744.28, 1,027.11 and 412.74 is: 569.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.28 : 1,027.11 = 412.74 : x
  2. Step 2: Convert to fraction form
    744.28/1,027.11 = 412.74/x
  3. Step 3: Cross multiply
    744.28x = 1,027.11 × 412.74
  4. Step 4: Simplify right side
    744.28x = 423,930.93
  5. Step 5: Solve for x
    x = 423,930.93/744.28
  6. Step 6: Final answer
    x = 569.58

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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.