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Finding the Fourth Proportional to 934.81, 1,400.09 and 448.21

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Solution

The fourth proportional to 934.81, 1,400.09 and 448.21 is: 671.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.81 : 1,400.09 = 448.21 : x
  2. Step 2: Convert to fraction form
    934.81/1,400.09 = 448.21/x
  3. Step 3: Cross multiply
    934.81x = 1,400.09 × 448.21
  4. Step 4: Simplify right side
    934.81x = 627,532.10
  5. Step 5: Solve for x
    x = 627,532.10/934.81
  6. Step 6: Final answer
    x = 671.29

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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.