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Finding the Fourth Proportional to 743.73, 1,026.38 and 412.20

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Solution

The fourth proportional to 743.73, 1,026.38 and 412.20 is: 568.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.73 : 1,026.38 = 412.20 : x
  2. Step 2: Convert to fraction form
    743.73/1,026.38 = 412.20/x
  3. Step 3: Cross multiply
    743.73x = 1,026.38 × 412.20
  4. Step 4: Simplify right side
    743.73x = 423,071.78
  5. Step 5: Solve for x
    x = 423,071.78/743.73
  6. Step 6: Final answer
    x = 568.85

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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.