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Finding the Fourth Proportional to 972.60, 1,341.97 and 579.43

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Solution

The fourth proportional to 972.60, 1,341.97 and 579.43 is: 799.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.60 : 1,341.97 = 579.43 : x
  2. Step 2: Convert to fraction form
    972.60/1,341.97 = 579.43/x
  3. Step 3: Cross multiply
    972.60x = 1,341.97 × 579.43
  4. Step 4: Simplify right side
    972.60x = 777,577.68
  5. Step 5: Solve for x
    x = 777,577.68/972.60
  6. Step 6: Final answer
    x = 799.48

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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.