Home / 1,390,664,023.70-2,086,275,971.55-408,088,663.70

Finding the Fourth Proportional to 1,390,664,023.70, 2,086,275,971.55 and 408,088,663.70

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Solution

The fourth proportional to 1,390,664,023.70, 2,086,275,971.55 and 408,088,663.70 is: 612,215,142.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,664,023.70 : 2,086,275,971.55 = 408,088,663.70 : x
  2. Step 2: Convert to fraction form
    1,390,664,023.70/2,086,275,971.55 = 408,088,663.70/x
  3. Step 3: Cross multiply
    1,390,664,023.70x = 2,086,275,971.55 × 408,088,663.70
  4. Step 4: Simplify right side
    1,390,664,023.70x = 851,385,573,339,258,624
  5. Step 5: Solve for x
    x = 851,385,573,339,258,624/1,390,664,023.70
  6. Step 6: Final answer
    x = 612,215,142.43

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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.