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Finding the Fourth Proportional to 948.51, 1,422.81 and 299.19

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Solution

The fourth proportional to 948.51, 1,422.81 and 299.19 is: 448.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.51 : 1,422.81 = 299.19 : x
  2. Step 2: Convert to fraction form
    948.51/1,422.81 = 299.19/x
  3. Step 3: Cross multiply
    948.51x = 1,422.81 × 299.19
  4. Step 4: Simplify right side
    948.51x = 425,689.03
  5. Step 5: Solve for x
    x = 425,689.03/948.51
  6. Step 6: Final answer
    x = 448.80

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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.