Home / 390,010,979.80-585,165,768.90-383,889,712.60

Finding the Fourth Proportional to 390,010,979.80, 585,165,768.90 and 383,889,712.60

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Solution

The fourth proportional to 390,010,979.80, 585,165,768.90 and 383,889,712.60 is: 575,981,524.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,010,979.80 : 585,165,768.90 = 383,889,712.60 : x
  2. Step 2: Convert to fraction form
    390,010,979.80/585,165,768.90 = 383,889,712.60/x
  3. Step 3: Cross multiply
    390,010,979.80x = 585,165,768.90 × 383,889,712.60
  4. Step 4: Simplify right side
    390,010,979.80x = 224,639,118,846,379,008
  5. Step 5: Solve for x
    x = 224,639,118,846,379,008/390,010,979.80
  6. Step 6: Final answer
    x = 575,981,524.83

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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.