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Finding the Fourth Proportional to 1,448.47, 2,172 and 474.31

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Solution

The fourth proportional to 1,448.47, 2,172 and 474.31 is: 711.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,448.47 : 2,172 = 474.31 : x
  2. Step 2: Convert to fraction form
    1,448.47/2,172 = 474.31/x
  3. Step 3: Cross multiply
    1,448.47x = 2,172 × 474.31
  4. Step 4: Simplify right side
    1,448.47x = 1,030,201.32
  5. Step 5: Solve for x
    x = 1,030,201.32/1,448.47
  6. Step 6: Final answer
    x = 711.23

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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.