Home / 426,893,309.28-640,377,774.72-120,188,079.36

Finding the Fourth Proportional to 426,893,309.28, 640,377,774.72 and 120,188,079.36

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Solution

The fourth proportional to 426,893,309.28, 640,377,774.72 and 120,188,079.36 is: 180,292,764.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,893,309.28 : 640,377,774.72 = 120,188,079.36 : x
  2. Step 2: Convert to fraction form
    426,893,309.28/640,377,774.72 = 120,188,079.36/x
  3. Step 3: Cross multiply
    426,893,309.28x = 640,377,774.72 × 120,188,079.36
  4. Step 4: Simplify right side
    426,893,309.28x = 76,965,774,808,427,568
  5. Step 5: Solve for x
    x = 76,965,774,808,427,568/426,893,309.28
  6. Step 6: Final answer
    x = 180,292,764.34

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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.