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Finding the Fourth Proportional to 290,562.72, 436,500.21 and 172,311.63

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Solution

The fourth proportional to 290,562.72, 436,500.21 and 172,311.63 is: 258,856.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,562.72 : 436,500.21 = 172,311.63 : x
  2. Step 2: Convert to fraction form
    290,562.72/436,500.21 = 172,311.63/x
  3. Step 3: Cross multiply
    290,562.72x = 436,500.21 × 172,311.63
  4. Step 4: Simplify right side
    290,562.72x = 75,214,062,680.44
  5. Step 5: Solve for x
    x = 75,214,062,680.44/290,562.72
  6. Step 6: Final answer
    x = 258,856.55

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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.