Home / 290,087.11-400,188.36-188,138.28

Finding the Fourth Proportional to 290,087.11, 400,188.36 and 188,138.28

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Solution

The fourth proportional to 290,087.11, 400,188.36 and 188,138.28 is: 259,545.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,087.11 : 400,188.36 = 188,138.28 : x
  2. Step 2: Convert to fraction form
    290,087.11/400,188.36 = 188,138.28/x
  3. Step 3: Cross multiply
    290,087.11x = 400,188.36 × 188,138.28
  4. Step 4: Simplify right side
    290,087.11x = 75,290,749,726.42
  5. Step 5: Solve for x
    x = 75,290,749,726.42/290,087.11
  6. Step 6: Final answer
    x = 259,545.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.