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Finding the Fourth Proportional to 487.13, 730.78 and 230.63

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Solution

The fourth proportional to 487.13, 730.78 and 230.63 is: 345.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.13 : 730.78 = 230.63 : x
  2. Step 2: Convert to fraction form
    487.13/730.78 = 230.63/x
  3. Step 3: Cross multiply
    487.13x = 730.78 × 230.63
  4. Step 4: Simplify right side
    487.13x = 168,535.56
  5. Step 5: Solve for x
    x = 168,535.56/487.13
  6. Step 6: Final answer
    x = 345.98

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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.