Home / 515,402,277.20-711,249,163.82-280,448,889.59

Finding the Fourth Proportional to 515,402,277.20, 711,249,163.82 and 280,448,889.59

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Solution

The fourth proportional to 515,402,277.20, 711,249,163.82 and 280,448,889.59 is: 387,016,214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,402,277.20 : 711,249,163.82 = 280,448,889.59 : x
  2. Step 2: Convert to fraction form
    515,402,277.20/711,249,163.82 = 280,448,889.59/x
  3. Step 3: Cross multiply
    515,402,277.20x = 711,249,163.82 × 280,448,889.59
  4. Step 4: Simplify right side
    515,402,277.20x = 199,469,038,215,135,008
  5. Step 5: Solve for x
    x = 199,469,038,215,135,008/515,402,277.20
  6. Step 6: Final answer
    x = 387,016,214.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.