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Finding the Fourth Proportional to 529.60, 730.84 and 308.56

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Solution

The fourth proportional to 529.60, 730.84 and 308.56 is: 425.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.60 : 730.84 = 308.56 : x
  2. Step 2: Convert to fraction form
    529.60/730.84 = 308.56/x
  3. Step 3: Cross multiply
    529.60x = 730.84 × 308.56
  4. Step 4: Simplify right side
    529.60x = 225,507.99
  5. Step 5: Solve for x
    x = 225,507.99/529.60
  6. Step 6: Final answer
    x = 425.81

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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.