Home / 820,209.20-1,230,508.20-420,911.60

Finding the Fourth Proportional to 820,209.20, 1,230,508.20 and 420,911.60

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Solution

The fourth proportional to 820,209.20, 1,230,508.20 and 420,911.60 is: 631,467.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,209.20 : 1,230,508.20 = 420,911.60 : x
  2. Step 2: Convert to fraction form
    820,209.20/1,230,508.20 = 420,911.60/x
  3. Step 3: Cross multiply
    820,209.20x = 1,230,508.20 × 420,911.60
  4. Step 4: Simplify right side
    820,209.20x = 517,935,175,275.12
  5. Step 5: Solve for x
    x = 517,935,175,275.12/820,209.20
  6. Step 6: Final answer
    x = 631,467.16

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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.