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Finding the Fourth Proportional to 272,641.40, 408,962.10 and 188,660.60

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Solution

The fourth proportional to 272,641.40, 408,962.10 and 188,660.60 is: 282,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,641.40 : 408,962.10 = 188,660.60 : x
  2. Step 2: Convert to fraction form
    272,641.40/408,962.10 = 188,660.60/x
  3. Step 3: Cross multiply
    272,641.40x = 408,962.10 × 188,660.60
  4. Step 4: Simplify right side
    272,641.40x = 77,155,035,163.26
  5. Step 5: Solve for x
    x = 77,155,035,163.26/272,641.40
  6. Step 6: Final answer
    x = 282,990.90

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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.