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Finding the Fourth Proportional to 281,329.61, 388,239.48 and 158,828.45

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Solution

The fourth proportional to 281,329.61, 388,239.48 and 158,828.45 is: 219,185.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,329.61 : 388,239.48 = 158,828.45 : x
  2. Step 2: Convert to fraction form
    281,329.61/388,239.48 = 158,828.45/x
  3. Step 3: Cross multiply
    281,329.61x = 388,239.48 × 158,828.45
  4. Step 4: Simplify right side
    281,329.61x = 61,663,472,896.01
  5. Step 5: Solve for x
    x = 61,663,472,896.01/281,329.61
  6. Step 6: Final answer
    x = 219,185.87

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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.