Home / 288,387,955.72-398,503,285.92-209,935,306.72

Finding the Fourth Proportional to 288,387,955.72, 398,503,285.92 and 209,935,306.72

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Solution

The fourth proportional to 288,387,955.72, 398,503,285.92 and 209,935,306.72 is: 290,095,019.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,387,955.72 : 398,503,285.92 = 209,935,306.72 : x
  2. Step 2: Convert to fraction form
    288,387,955.72/398,503,285.92 = 209,935,306.72/x
  3. Step 3: Cross multiply
    288,387,955.72x = 398,503,285.92 × 209,935,306.72
  4. Step 4: Simplify right side
    288,387,955.72x = 83,659,909,558,543,056
  5. Step 5: Solve for x
    x = 83,659,909,558,543,056/288,387,955.72
  6. Step 6: Final answer
    x = 290,095,019.22

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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.