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Finding the Fourth Proportional to 620,612.52, 856,481.72 and 467,380.20

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Solution

The fourth proportional to 620,612.52, 856,481.72 and 467,380.20 is: 645,012.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,612.52 : 856,481.72 = 467,380.20 : x
  2. Step 2: Convert to fraction form
    620,612.52/856,481.72 = 467,380.20/x
  3. Step 3: Cross multiply
    620,612.52x = 856,481.72 × 467,380.20
  4. Step 4: Simplify right side
    620,612.52x = 400,302,597,589.94
  5. Step 5: Solve for x
    x = 400,302,597,589.94/620,612.52
  6. Step 6: Final answer
    x = 645,012.12

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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.