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Finding the Fourth Proportional to 220,896, 304,865.28 and 131,472

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Solution

The fourth proportional to 220,896, 304,865.28 and 131,472 is: 181,448.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,896 : 304,865.28 = 131,472 : x
  2. Step 2: Convert to fraction form
    220,896/304,865.28 = 131,472/x
  3. Step 3: Cross multiply
    220,896x = 304,865.28 × 131,472
  4. Step 4: Simplify right side
    220,896x = 40,081,248,092.16
  5. Step 5: Solve for x
    x = 40,081,248,092.16/220,896
  6. Step 6: Final answer
    x = 181,448.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.