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Finding the Fourth Proportional to 800,451.60, 1,200,856.50 and 421,550.72

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Solution

The fourth proportional to 800,451.60, 1,200,856.50 and 421,550.72 is: 632,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,451.60 : 1,200,856.50 = 421,550.72 : x
  2. Step 2: Convert to fraction form
    800,451.60/1,200,856.50 = 421,550.72/x
  3. Step 3: Cross multiply
    800,451.60x = 1,200,856.50 × 421,550.72
  4. Step 4: Simplify right side
    800,451.60x = 506,221,922,191.68
  5. Step 5: Solve for x
    x = 506,221,922,191.68/800,451.60
  6. Step 6: Final answer
    x = 632,420.40

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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.