Home / 288,387,956.49-398,503,286.94-209,935,307.46

Finding the Fourth Proportional to 288,387,956.49, 398,503,286.94 and 209,935,307.46

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Solution

The fourth proportional to 288,387,956.49, 398,503,286.94 and 209,935,307.46 is: 290,095,020.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,387,956.49 : 398,503,286.94 = 209,935,307.46 : x
  2. Step 2: Convert to fraction form
    288,387,956.49/398,503,286.94 = 209,935,307.46/x
  3. Step 3: Cross multiply
    288,387,956.49x = 398,503,286.94 × 209,935,307.46
  4. Step 4: Simplify right side
    288,387,956.49x = 83,659,910,067,569,504
  5. Step 5: Solve for x
    x = 83,659,910,067,569,504/288,387,956.49
  6. Step 6: Final answer
    x = 290,095,020.21

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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.