Home / 290,088.11-400,189.74-188,139.28

Finding the Fourth Proportional to 290,088.11, 400,189.74 and 188,139.28

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Solution

The fourth proportional to 290,088.11, 400,189.74 and 188,139.28 is: 259,546.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,088.11 : 400,189.74 = 188,139.28 : x
  2. Step 2: Convert to fraction form
    290,088.11/400,189.74 = 188,139.28/x
  3. Step 3: Cross multiply
    290,088.11x = 400,189.74 × 188,139.28
  4. Step 4: Simplify right side
    290,088.11x = 75,291,409,546.99
  5. Step 5: Solve for x
    x = 75,291,409,546.99/290,088.11
  6. Step 6: Final answer
    x = 259,546.69

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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.