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Finding the Fourth Proportional to 743.92, 1,026.61 and 412.34

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Solution

The fourth proportional to 743.92, 1,026.61 and 412.34 is: 569.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.92 : 1,026.61 = 412.34 : x
  2. Step 2: Convert to fraction form
    743.92/1,026.61 = 412.34/x
  3. Step 3: Cross multiply
    743.92x = 1,026.61 × 412.34
  4. Step 4: Simplify right side
    743.92x = 423,306.20
  5. Step 5: Solve for x
    x = 423,306.20/743.92
  6. Step 6: Final answer
    x = 569.02

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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.