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Finding the Fourth Proportional to 258,942.80, 388,511.40 and 101,284.40

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Solution

The fourth proportional to 258,942.80, 388,511.40 and 101,284.40 is: 151,964.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,942.80 : 388,511.40 = 101,284.40 : x
  2. Step 2: Convert to fraction form
    258,942.80/388,511.40 = 101,284.40/x
  3. Step 3: Cross multiply
    258,942.80x = 388,511.40 × 101,284.40
  4. Step 4: Simplify right side
    258,942.80x = 39,350,144,042.16
  5. Step 5: Solve for x
    x = 39,350,144,042.16/258,942.80
  6. Step 6: Final answer
    x = 151,964.62

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1.5x scale

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.