Home / 288,387,958.49-398,503,289.70-209,935,309.46

Finding the Fourth Proportional to 288,387,958.49, 398,503,289.70 and 209,935,309.46

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Solution

The fourth proportional to 288,387,958.49, 398,503,289.70 and 209,935,309.46 is: 290,095,022.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,387,958.49 : 398,503,289.70 = 209,935,309.46 : x
  2. Step 2: Convert to fraction form
    288,387,958.49/398,503,289.70 = 209,935,309.46/x
  3. Step 3: Cross multiply
    288,387,958.49x = 398,503,289.70 × 209,935,309.46
  4. Step 4: Simplify right side
    288,387,958.49x = 83,659,911,443,997,536
  5. Step 5: Solve for x
    x = 83,659,911,443,997,536/288,387,958.49
  6. Step 6: Final answer
    x = 290,095,022.98

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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.