Home / 426,947.68-640,458-127,408.96

Finding the Fourth Proportional to 426,947.68, 640,458 and 127,408.96

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Solution

The fourth proportional to 426,947.68, 640,458 and 127,408.96 is: 191,124.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,947.68 : 640,458 = 127,408.96 : x
  2. Step 2: Convert to fraction form
    426,947.68/640,458 = 127,408.96/x
  3. Step 3: Cross multiply
    426,947.68x = 640,458 × 127,408.96
  4. Step 4: Simplify right side
    426,947.68x = 81,600,087,703.68
  5. Step 5: Solve for x
    x = 81,600,087,703.68/426,947.68
  6. Step 6: Final answer
    x = 191,124.33

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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.