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Finding the Fourth Proportional to 258,893,669.80, 388,340,504.70 and 157,303,858.60

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Solution

The fourth proportional to 258,893,669.80, 388,340,504.70 and 157,303,858.60 is: 235,955,787.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,893,669.80 : 388,340,504.70 = 157,303,858.60 : x
  2. Step 2: Convert to fraction form
    258,893,669.80/388,340,504.70 = 157,303,858.60/x
  3. Step 3: Cross multiply
    258,893,669.80x = 388,340,504.70 × 157,303,858.60
  4. Step 4: Simplify right side
    258,893,669.80x = 61,087,459,839,981,432
  5. Step 5: Solve for x
    x = 61,087,459,839,981,432/258,893,669.80
  6. Step 6: Final answer
    x = 235,955,787.90

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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.