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Finding the Fourth Proportional to 398.99, 598.52 and 125.08

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Solution

The fourth proportional to 398.99, 598.52 and 125.08 is: 187.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.99 : 598.52 = 125.08 : x
  2. Step 2: Convert to fraction form
    398.99/598.52 = 125.08/x
  3. Step 3: Cross multiply
    398.99x = 598.52 × 125.08
  4. Step 4: Simplify right side
    398.99x = 74,866.25
  5. Step 5: Solve for x
    x = 74,866.25/398.99
  6. Step 6: Final answer
    x = 187.64

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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.