Home / 521,155.40-781,992.30-205,622.60

Finding the Fourth Proportional to 521,155.40, 781,992.30 and 205,622.60

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Solution

The fourth proportional to 521,155.40, 781,992.30 and 205,622.60 is: 308,536.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,155.40 : 781,992.30 = 205,622.60 : x
  2. Step 2: Convert to fraction form
    521,155.40/781,992.30 = 205,622.60/x
  3. Step 3: Cross multiply
    521,155.40x = 781,992.30 × 205,622.60
  4. Step 4: Simplify right side
    521,155.40x = 160,795,289,905.98
  5. Step 5: Solve for x
    x = 160,795,289,905.98/521,155.40
  6. Step 6: Final answer
    x = 308,536.17

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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.