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Finding the Fourth Proportional to 290,998.20, 436,626.90 and 133,145.40

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Solution

The fourth proportional to 290,998.20, 436,626.90 and 133,145.40 is: 199,777.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,998.20 : 436,626.90 = 133,145.40 : x
  2. Step 2: Convert to fraction form
    290,998.20/436,626.90 = 133,145.40/x
  3. Step 3: Cross multiply
    290,998.20x = 436,626.90 × 133,145.40
  4. Step 4: Simplify right side
    290,998.20x = 58,134,863,251.26
  5. Step 5: Solve for x
    x = 58,134,863,251.26/290,998.20
  6. Step 6: Final answer
    x = 199,777.40

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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.