Home / 809,738.20-1,215,125.70-472,778.20

Finding the Fourth Proportional to 809,738.20, 1,215,125.70 and 472,778.20

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Solution

The fourth proportional to 809,738.20, 1,215,125.70 and 472,778.20 is: 709,469.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,738.20 : 1,215,125.70 = 472,778.20 : x
  2. Step 2: Convert to fraction form
    809,738.20/1,215,125.70 = 472,778.20/x
  3. Step 3: Cross multiply
    809,738.20x = 1,215,125.70 × 472,778.20
  4. Step 4: Simplify right side
    809,738.20x = 574,484,941,219.74
  5. Step 5: Solve for x
    x = 574,484,941,219.74/809,738.20
  6. Step 6: Final answer
    x = 709,469.98

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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.