Home / 819,376,721.20-1,229,065,081.80-805,771,831.60

Finding the Fourth Proportional to 819,376,721.20, 1,229,065,081.80 and 805,771,831.60

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Solution

The fourth proportional to 819,376,721.20, 1,229,065,081.80 and 805,771,831.60 is: 1,208,657,747.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,376,721.20 : 1,229,065,081.80 = 805,771,831.60 : x
  2. Step 2: Convert to fraction form
    819,376,721.20/1,229,065,081.80 = 805,771,831.60/x
  3. Step 3: Cross multiply
    819,376,721.20x = 1,229,065,081.80 × 805,771,831.60
  4. Step 4: Simplify right side
    819,376,721.20x = 990,346,022,117,589,760
  5. Step 5: Solve for x
    x = 990,346,022,117,589,760/819,376,721.20
  6. Step 6: Final answer
    x = 1,208,657,747.40

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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.