Home / 809,328.70-1,214,977.20-409,763.80

Finding the Fourth Proportional to 809,328.70, 1,214,977.20 and 409,763.80

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Solution

The fourth proportional to 809,328.70, 1,214,977.20 and 409,763.80 is: 615,143.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,328.70 : 1,214,977.20 = 409,763.80 : x
  2. Step 2: Convert to fraction form
    809,328.70/1,214,977.20 = 409,763.80/x
  3. Step 3: Cross multiply
    809,328.70x = 1,214,977.20 × 409,763.80
  4. Step 4: Simplify right side
    809,328.70x = 497,853,674,385.36
  5. Step 5: Solve for x
    x = 497,853,674,385.36/809,328.70
  6. Step 6: Final answer
    x = 615,143.98

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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.