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Finding the Fourth Proportional to 948.65, 1,422.97 and 299.39

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Solution

The fourth proportional to 948.65, 1,422.97 and 299.39 is: 449.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.65 : 1,422.97 = 299.39 : x
  2. Step 2: Convert to fraction form
    948.65/1,422.97 = 299.39/x
  3. Step 3: Cross multiply
    948.65x = 1,422.97 × 299.39
  4. Step 4: Simplify right side
    948.65x = 426,015.12
  5. Step 5: Solve for x
    x = 426,015.12/948.65
  6. Step 6: Final answer
    x = 449.08

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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.