Home / 1,539,647,999.70-2,309,471,999.55-390,790,655.70

Finding the Fourth Proportional to 1,539,647,999.70, 2,309,471,999.55 and 390,790,655.70

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Solution

The fourth proportional to 1,539,647,999.70, 2,309,471,999.55 and 390,790,655.70 is: 586,185,983.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539,647,999.70 : 2,309,471,999.55 = 390,790,655.70 : x
  2. Step 2: Convert to fraction form
    1,539,647,999.70/2,309,471,999.55 = 390,790,655.70/x
  3. Step 3: Cross multiply
    1,539,647,999.70x = 2,309,471,999.55 × 390,790,655.70
  4. Step 4: Simplify right side
    1,539,647,999.70x = 902,520,077,024,934,656
  5. Step 5: Solve for x
    x = 902,520,077,024,934,656/1,539,647,999.70
  6. Step 6: Final answer
    x = 586,185,983.55

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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.