Home / 513,921,993.04-709,213,249.92-278,972,812.72

Finding the Fourth Proportional to 513,921,993.04, 709,213,249.92 and 278,972,812.72

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Solution

The fourth proportional to 513,921,993.04, 709,213,249.92 and 278,972,812.72 is: 384,982,969.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,921,993.04 : 709,213,249.92 = 278,972,812.72 : x
  2. Step 2: Convert to fraction form
    513,921,993.04/709,213,249.92 = 278,972,812.72/x
  3. Step 3: Cross multiply
    513,921,993.04x = 709,213,249.92 × 278,972,812.72
  4. Step 4: Simplify right side
    513,921,993.04x = 197,851,215,148,474,720
  5. Step 5: Solve for x
    x = 197,851,215,148,474,720/513,921,993.04
  6. Step 6: Final answer
    x = 384,982,969.84

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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.