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Finding the Fourth Proportional to 743.97, 1,026.71 and 412.39

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Solution

The fourth proportional to 743.97, 1,026.71 and 412.39 is: 569.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.97 : 1,026.71 = 412.39 : x
  2. Step 2: Convert to fraction form
    743.97/1,026.71 = 412.39/x
  3. Step 3: Cross multiply
    743.97x = 1,026.71 × 412.39
  4. Step 4: Simplify right side
    743.97x = 423,402.87
  5. Step 5: Solve for x
    x = 423,402.87/743.97
  6. Step 6: Final answer
    x = 569.11

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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.