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Finding the Fourth Proportional to 547,734.88, 755,744.61 and 318,155.77

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Solution

The fourth proportional to 547,734.88, 755,744.61 and 318,155.77 is: 438,979.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,734.88 : 755,744.61 = 318,155.77 : x
  2. Step 2: Convert to fraction form
    547,734.88/755,744.61 = 318,155.77/x
  3. Step 3: Cross multiply
    547,734.88x = 755,744.61 × 318,155.77
  4. Step 4: Simplify right side
    547,734.88x = 240,444,508,317.90
  5. Step 5: Solve for x
    x = 240,444,508,317.90/547,734.88
  6. Step 6: Final answer
    x = 438,979.73

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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.