Home / 813,891,388.40-1,220,911,732.20-268,634,121.20

Finding the Fourth Proportional to 813,891,388.40, 1,220,911,732.20 and 268,634,121.20

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Solution

The fourth proportional to 813,891,388.40, 1,220,911,732.20 and 268,634,121.20 is: 402,975,820.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,891,388.40 : 1,220,911,732.20 = 268,634,121.20 : x
  2. Step 2: Convert to fraction form
    813,891,388.40/1,220,911,732.20 = 268,634,121.20/x
  3. Step 3: Cross multiply
    813,891,388.40x = 1,220,911,732.20 × 268,634,121.20
  4. Step 4: Simplify right side
    813,891,388.40x = 327,978,550,242,316,736
  5. Step 5: Solve for x
    x = 327,978,550,242,316,736/813,891,388.40
  6. Step 6: Final answer
    x = 402,975,820.75

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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.