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Finding the Fourth Proportional to 258,829.38, 388,337.48 and 90,374.52

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Solution

The fourth proportional to 258,829.38, 388,337.48 and 90,374.52 is: 135,594.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,829.38 : 388,337.48 = 90,374.52 : x
  2. Step 2: Convert to fraction form
    258,829.38/388,337.48 = 90,374.52/x
  3. Step 3: Cross multiply
    258,829.38x = 388,337.48 × 90,374.52
  4. Step 4: Simplify right side
    258,829.38x = 35,095,813,353.01
  5. Step 5: Solve for x
    x = 35,095,813,353.01/258,829.38
  6. Step 6: Final answer
    x = 135,594.40

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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.