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Finding the Fourth Proportional to 258,925.01, 388,480.73 and 90,470.12

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Solution

The fourth proportional to 258,925.01, 388,480.73 and 90,470.12 is: 135,737.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,925.01 : 388,480.73 = 90,470.12 : x
  2. Step 2: Convert to fraction form
    258,925.01/388,480.73 = 90,470.12/x
  3. Step 3: Cross multiply
    258,925.01x = 388,480.73 × 90,470.12
  4. Step 4: Simplify right side
    258,925.01x = 35,145,895,866.03
  5. Step 5: Solve for x
    x = 35,145,895,866.03/258,925.01
  6. Step 6: Final answer
    x = 135,737.74

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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.