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Finding the Fourth Proportional to 487.23, 730.86 and 198.47

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Solution

The fourth proportional to 487.23, 730.86 and 198.47 is: 297.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.23 : 730.86 = 198.47 : x
  2. Step 2: Convert to fraction form
    487.23/730.86 = 198.47/x
  3. Step 3: Cross multiply
    487.23x = 730.86 × 198.47
  4. Step 4: Simplify right side
    487.23x = 145,050.13
  5. Step 5: Solve for x
    x = 145,050.13/487.23
  6. Step 6: Final answer
    x = 297.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.