Home / 820,154.20-1,230,425.70-420,856.60

Finding the Fourth Proportional to 820,154.20, 1,230,425.70 and 420,856.60

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Solution

The fourth proportional to 820,154.20, 1,230,425.70 and 420,856.60 is: 631,384.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,154.20 : 1,230,425.70 = 420,856.60 : x
  2. Step 2: Convert to fraction form
    820,154.20/1,230,425.70 = 420,856.60/x
  3. Step 3: Cross multiply
    820,154.20x = 1,230,425.70 × 420,856.60
  4. Step 4: Simplify right side
    820,154.20x = 517,832,776,654.62
  5. Step 5: Solve for x
    x = 517,832,776,654.62/820,154.20
  6. Step 6: Final answer
    x = 631,384.66

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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.