Home / 538,985.12-809,038.45-396,990.73

Finding the Fourth Proportional to 538,985.12, 809,038.45 and 396,990.73

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Solution

The fourth proportional to 538,985.12, 809,038.45 and 396,990.73 is: 595,899.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,985.12 : 809,038.45 = 396,990.73 : x
  2. Step 2: Convert to fraction form
    538,985.12/809,038.45 = 396,990.73/x
  3. Step 3: Cross multiply
    538,985.12x = 809,038.45 × 396,990.73
  4. Step 4: Simplify right side
    538,985.12x = 321,180,766,113.16
  5. Step 5: Solve for x
    x = 321,180,766,113.16/538,985.12
  6. Step 6: Final answer
    x = 595,899.13

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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.