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Finding the Fourth Proportional to 258,942.30, 388,510.65 and 101,283.90

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Solution

The fourth proportional to 258,942.30, 388,510.65 and 101,283.90 is: 151,963.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,942.30 : 388,510.65 = 101,283.90 : x
  2. Step 2: Convert to fraction form
    258,942.30/388,510.65 = 101,283.90/x
  3. Step 3: Cross multiply
    258,942.30x = 388,510.65 × 101,283.90
  4. Step 4: Simplify right side
    258,942.30x = 39,349,873,823.54
  5. Step 5: Solve for x
    x = 39,349,873,823.54/258,942.30
  6. Step 6: Final answer
    x = 151,963.87

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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.