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Finding the Fourth Proportional to 230.40, 355.20 and 230.40

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Solution

The fourth proportional to 230.40, 355.20 and 230.40 is: 355.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.40 : 355.20 = 230.40 : x
  2. Step 2: Convert to fraction form
    230.40/355.20 = 230.40/x
  3. Step 3: Cross multiply
    230.40x = 355.20 × 230.40
  4. Step 4: Simplify right side
    230.40x = 81,838.08
  5. Step 5: Solve for x
    x = 81,838.08/230.40
  6. Step 6: Final answer
    x = 355.20

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.