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Finding the Fourth Proportional to 397.94, 597.28 and 215.48

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Solution

The fourth proportional to 397.94, 597.28 and 215.48 is: 323.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.94 : 597.28 = 215.48 : x
  2. Step 2: Convert to fraction form
    397.94/597.28 = 215.48/x
  3. Step 3: Cross multiply
    397.94x = 597.28 × 215.48
  4. Step 4: Simplify right side
    397.94x = 128,697.83
  5. Step 5: Solve for x
    x = 128,697.83/397.94
  6. Step 6: Final answer
    x = 323.41

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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.