Home / 820,104.60-1,230,156.90-811,810.20

Finding the Fourth Proportional to 820,104.60, 1,230,156.90 and 811,810.20

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Solution

The fourth proportional to 820,104.60, 1,230,156.90 and 811,810.20 is: 1,217,715.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,104.60 : 1,230,156.90 = 811,810.20 : x
  2. Step 2: Convert to fraction form
    820,104.60/1,230,156.90 = 811,810.20/x
  3. Step 3: Cross multiply
    820,104.60x = 1,230,156.90 × 811,810.20
  4. Step 4: Simplify right side
    820,104.60x = 998,653,919,020.38
  5. Step 5: Solve for x
    x = 998,653,919,020.38/820,104.60
  6. Step 6: Final answer
    x = 1,217,715.30

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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.