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Finding the Fourth Proportional to 529.35, 730.54 and 308.30

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Solution

The fourth proportional to 529.35, 730.54 and 308.30 is: 425.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.35 : 730.54 = 308.30 : x
  2. Step 2: Convert to fraction form
    529.35/730.54 = 308.30/x
  3. Step 3: Cross multiply
    529.35x = 730.54 × 308.30
  4. Step 4: Simplify right side
    529.35x = 225,222.21
  5. Step 5: Solve for x
    x = 225,222.21/529.35
  6. Step 6: Final answer
    x = 425.47

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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.