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Finding the Fourth Proportional to 402.36, 603.60 and 207.28

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Solution

The fourth proportional to 402.36, 603.60 and 207.28 is: 310.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.36 : 603.60 = 207.28 : x
  2. Step 2: Convert to fraction form
    402.36/603.60 = 207.28/x
  3. Step 3: Cross multiply
    402.36x = 603.60 × 207.28
  4. Step 4: Simplify right side
    402.36x = 125,114.21
  5. Step 5: Solve for x
    x = 125,114.21/402.36
  6. Step 6: Final answer
    x = 310.95

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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.