Home / 809,621.40-1,215,209.70-410,712.60

Finding the Fourth Proportional to 809,621.40, 1,215,209.70 and 410,712.60

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Solution

The fourth proportional to 809,621.40, 1,215,209.70 and 410,712.60 is: 616,463.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,621.40 : 1,215,209.70 = 410,712.60 : x
  2. Step 2: Convert to fraction form
    809,621.40/1,215,209.70 = 410,712.60/x
  3. Step 3: Cross multiply
    809,621.40x = 1,215,209.70 × 410,712.60
  4. Step 4: Simplify right side
    809,621.40x = 499,101,935,432.22
  5. Step 5: Solve for x
    x = 499,101,935,432.22/809,621.40
  6. Step 6: Final answer
    x = 616,463.37

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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.