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Finding the Fourth Proportional to 654,650.80, 903,403.88 and 379,020.28

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Solution

The fourth proportional to 654,650.80, 903,403.88 and 379,020.28 is: 523,039.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,650.80 : 903,403.88 = 379,020.28 : x
  2. Step 2: Convert to fraction form
    654,650.80/903,403.88 = 379,020.28/x
  3. Step 3: Cross multiply
    654,650.80x = 903,403.88 × 379,020.28
  4. Step 4: Simplify right side
    654,650.80x = 342,408,391,550.69
  5. Step 5: Solve for x
    x = 342,408,391,550.69/654,650.80
  6. Step 6: Final answer
    x = 523,039.75

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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.