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Finding the Fourth Proportional to 398.18, 597.21 and 124.23

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Solution

The fourth proportional to 398.18, 597.21 and 124.23 is: 186.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.18 : 597.21 = 124.23 : x
  2. Step 2: Convert to fraction form
    398.18/597.21 = 124.23/x
  3. Step 3: Cross multiply
    398.18x = 597.21 × 124.23
  4. Step 4: Simplify right side
    398.18x = 74,191.40
  5. Step 5: Solve for x
    x = 74,191.40/398.18
  6. Step 6: Final answer
    x = 186.33

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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.