Home / 685,681,488.81-1,028,794,773.20-219,414,753.81

Finding the Fourth Proportional to 685,681,488.81, 1,028,794,773.20 and 219,414,753.81

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Solution

The fourth proportional to 685,681,488.81, 1,028,794,773.20 and 219,414,753.81 is: 329,209,342.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,681,488.81 : 1,028,794,773.20 = 219,414,753.81 : x
  2. Step 2: Convert to fraction form
    685,681,488.81/1,028,794,773.20 = 219,414,753.81/x
  3. Step 3: Cross multiply
    685,681,488.81x = 1,028,794,773.20 × 219,414,753.81
  4. Step 4: Simplify right side
    685,681,488.81x = 225,732,751,881,595,712
  5. Step 5: Solve for x
    x = 225,732,751,881,595,712/685,681,488.81
  6. Step 6: Final answer
    x = 329,209,342.19

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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.