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Finding the Fourth Proportional to 655,862.32, 905,091.78 and 380,273.68

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Solution

The fourth proportional to 655,862.32, 905,091.78 and 380,273.68 is: 524,778.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,862.32 : 905,091.78 = 380,273.68 : x
  2. Step 2: Convert to fraction form
    655,862.32/905,091.78 = 380,273.68/x
  3. Step 3: Cross multiply
    655,862.32x = 905,091.78 × 380,273.68
  4. Step 4: Simplify right side
    655,862.32x = 344,182,581,918.35
  5. Step 5: Solve for x
    x = 344,182,581,918.35/655,862.32
  6. Step 6: Final answer
    x = 524,778.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.