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Finding the Fourth Proportional to 1,448.97, 2,172.75 and 474.81

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Solution

The fourth proportional to 1,448.97, 2,172.75 and 474.81 is: 711.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,448.97 : 2,172.75 = 474.81 : x
  2. Step 2: Convert to fraction form
    1,448.97/2,172.75 = 474.81/x
  3. Step 3: Cross multiply
    1,448.97x = 2,172.75 × 474.81
  4. Step 4: Simplify right side
    1,448.97x = 1,031,643.43
  5. Step 5: Solve for x
    x = 1,031,643.43/1,448.97
  6. Step 6: Final answer
    x = 711.98

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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.