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Finding the Fourth Proportional to 397.91, 597 and 235.40

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Solution

The fourth proportional to 397.91, 597 and 235.40 is: 353.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.91 : 597 = 235.40 : x
  2. Step 2: Convert to fraction form
    397.91/597 = 235.40/x
  3. Step 3: Cross multiply
    397.91x = 597 × 235.40
  4. Step 4: Simplify right side
    397.91x = 140,533.80
  5. Step 5: Solve for x
    x = 140,533.80/397.91
  6. Step 6: Final answer
    x = 353.18

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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.