Home / 813,888,670.40-1,220,907,655.20-268,631,403.20

Finding the Fourth Proportional to 813,888,670.40, 1,220,907,655.20 and 268,631,403.20

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Solution

The fourth proportional to 813,888,670.40, 1,220,907,655.20 and 268,631,403.20 is: 402,971,743.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,888,670.40 : 1,220,907,655.20 = 268,631,403.20 : x
  2. Step 2: Convert to fraction form
    813,888,670.40/1,220,907,655.20 = 268,631,403.20/x
  3. Step 3: Cross multiply
    813,888,670.40x = 1,220,907,655.20 × 268,631,403.20
  4. Step 4: Simplify right side
    813,888,670.40x = 327,974,136,593,997,760
  5. Step 5: Solve for x
    x = 327,974,136,593,997,760/813,888,670.40
  6. Step 6: Final answer
    x = 402,971,743.58

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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.