Home / 820,431.60-1,229,956.20-426,447.60

Finding the Fourth Proportional to 820,431.60, 1,229,956.20 and 426,447.60

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Solution

The fourth proportional to 820,431.60, 1,229,956.20 and 426,447.60 is: 639,312.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,431.60 : 1,229,956.20 = 426,447.60 : x
  2. Step 2: Convert to fraction form
    820,431.60/1,229,956.20 = 426,447.60/x
  3. Step 3: Cross multiply
    820,431.60x = 1,229,956.20 × 426,447.60
  4. Step 4: Simplify right side
    820,431.60x = 524,511,869,595.12
  5. Step 5: Solve for x
    x = 524,511,869,595.12/820,431.60
  6. Step 6: Final answer
    x = 639,312.12

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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.