Home / 820,225.20-1,230,532.20-420,927.60

Finding the Fourth Proportional to 820,225.20, 1,230,532.20 and 420,927.60

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Solution

The fourth proportional to 820,225.20, 1,230,532.20 and 420,927.60 is: 631,491.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,225.20 : 1,230,532.20 = 420,927.60 : x
  2. Step 2: Convert to fraction form
    820,225.20/1,230,532.20 = 420,927.60/x
  3. Step 3: Cross multiply
    820,225.20x = 1,230,532.20 × 420,927.60
  4. Step 4: Simplify right side
    820,225.20x = 517,964,965,668.72
  5. Step 5: Solve for x
    x = 517,964,965,668.72/820,225.20
  6. Step 6: Final answer
    x = 631,491.16

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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.