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Finding the Fourth Proportional to 397.70, 595.88 and 243.15

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Solution

The fourth proportional to 397.70, 595.88 and 243.15 is: 364.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.70 : 595.88 = 243.15 : x
  2. Step 2: Convert to fraction form
    397.70/595.88 = 243.15/x
  3. Step 3: Cross multiply
    397.70x = 595.88 × 243.15
  4. Step 4: Simplify right side
    397.70x = 144,888.22
  5. Step 5: Solve for x
    x = 144,888.22/397.70
  6. Step 6: Final answer
    x = 364.32

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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.