Home / 1,242,122.67-1,861,855.20-642,480.12

Finding the Fourth Proportional to 1,242,122.67, 1,861,855.20 and 642,480.12

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Solution

The fourth proportional to 1,242,122.67, 1,861,855.20 and 642,480.12 is: 963,032.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,122.67 : 1,861,855.20 = 642,480.12 : x
  2. Step 2: Convert to fraction form
    1,242,122.67/1,861,855.20 = 642,480.12/x
  3. Step 3: Cross multiply
    1,242,122.67x = 1,861,855.20 × 642,480.12
  4. Step 4: Simplify right side
    1,242,122.67x = 1,196,204,952,318.62
  5. Step 5: Solve for x
    x = 1,196,204,952,318.62/1,242,122.67
  6. Step 6: Final answer
    x = 963,032.86

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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.