Home / 786,084,356.82-1,178,505,247.48-392,409,139.40

Finding the Fourth Proportional to 786,084,356.82, 1,178,505,247.48 and 392,409,139.40

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Solution

The fourth proportional to 786,084,356.82, 1,178,505,247.48 and 392,409,139.40 is: 588,303,565.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,084,356.82 : 1,178,505,247.48 = 392,409,139.40 : x
  2. Step 2: Convert to fraction form
    786,084,356.82/1,178,505,247.48 = 392,409,139.40/x
  3. Step 3: Cross multiply
    786,084,356.82x = 1,178,505,247.48 × 392,409,139.40
  4. Step 4: Simplify right side
    786,084,356.82x = 462,456,229,942,010,816
  5. Step 5: Solve for x
    x = 462,456,229,942,010,816/786,084,356.82
  6. Step 6: Final answer
    x = 588,303,565.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.