Home / 388,306,979.78-582,462,647.06-129,521,489.58

Finding the Fourth Proportional to 388,306,979.78, 582,462,647.06 and 129,521,489.58

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Solution

The fourth proportional to 388,306,979.78, 582,462,647.06 and 129,521,489.58 is: 194,282,960.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,306,979.78 : 582,462,647.06 = 129,521,489.58 : x
  2. Step 2: Convert to fraction form
    388,306,979.78/582,462,647.06 = 129,521,489.58/x
  3. Step 3: Cross multiply
    388,306,979.78x = 582,462,647.06 × 129,521,489.58
  4. Step 4: Simplify right side
    388,306,979.78x = 75,441,429,671,273,392
  5. Step 5: Solve for x
    x = 75,441,429,671,273,392/388,306,979.78
  6. Step 6: Final answer
    x = 194,282,960.65

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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.