Home / 1,187,308.20-1,781,135.10-388,396.20

Finding the Fourth Proportional to 1,187,308.20, 1,781,135.10 and 388,396.20

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Solution

The fourth proportional to 1,187,308.20, 1,781,135.10 and 388,396.20 is: 582,650.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,308.20 : 1,781,135.10 = 388,396.20 : x
  2. Step 2: Convert to fraction form
    1,187,308.20/1,781,135.10 = 388,396.20/x
  3. Step 3: Cross multiply
    1,187,308.20x = 1,781,135.10 × 388,396.20
  4. Step 4: Simplify right side
    1,187,308.20x = 691,786,104,526.62
  5. Step 5: Solve for x
    x = 691,786,104,526.62/1,187,308.20
  6. Step 6: Final answer
    x = 582,650.83

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1.5x scale

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.