Home / 385,988,321.28-532,667,997.76-209,776,329.38

Finding the Fourth Proportional to 385,988,321.28, 532,667,997.76 and 209,776,329.38

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Solution

The fourth proportional to 385,988,321.28, 532,667,997.76 and 209,776,329.38 is: 289,493,570.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,988,321.28 : 532,667,997.76 = 209,776,329.38 : x
  2. Step 2: Convert to fraction form
    385,988,321.28/532,667,997.76 = 209,776,329.38/x
  3. Step 3: Cross multiply
    385,988,321.28x = 532,667,997.76 × 209,776,329.38
  4. Step 4: Simplify right side
    385,988,321.28x = 111,741,137,348,286,864
  5. Step 5: Solve for x
    x = 111,741,137,348,286,864/385,988,321.28
  6. Step 6: Final answer
    x = 289,493,570.63

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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.