Home / 515,402,278.20-711,249,165.20-280,448,890.59

Finding the Fourth Proportional to 515,402,278.20, 711,249,165.20 and 280,448,890.59

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Solution

The fourth proportional to 515,402,278.20, 711,249,165.20 and 280,448,890.59 is: 387,016,215.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,402,278.20 : 711,249,165.20 = 280,448,890.59 : x
  2. Step 2: Convert to fraction form
    515,402,278.20/711,249,165.20 = 280,448,890.59/x
  3. Step 3: Cross multiply
    515,402,278.20x = 711,249,165.20 × 280,448,890.59
  4. Step 4: Simplify right side
    515,402,278.20x = 199,469,039,313,403,616
  5. Step 5: Solve for x
    x = 199,469,039,313,403,616/515,402,278.20
  6. Step 6: Final answer
    x = 387,016,215.78

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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.