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Finding the Fourth Proportional to 529.23, 730.09 and 308.05

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Solution

The fourth proportional to 529.23, 730.09 and 308.05 is: 424.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.23 : 730.09 = 308.05 : x
  2. Step 2: Convert to fraction form
    529.23/730.09 = 308.05/x
  3. Step 3: Cross multiply
    529.23x = 730.09 × 308.05
  4. Step 4: Simplify right side
    529.23x = 224,900.57
  5. Step 5: Solve for x
    x = 224,900.57/529.23
  6. Step 6: Final answer
    x = 424.96

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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.