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Finding the Fourth Proportional to 519,278.30, 778,859.85 and 425,620.70

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Solution

The fourth proportional to 519,278.30, 778,859.85 and 425,620.70 is: 638,383.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,278.30 : 778,859.85 = 425,620.70 : x
  2. Step 2: Convert to fraction form
    519,278.30/778,859.85 = 425,620.70/x
  3. Step 3: Cross multiply
    519,278.30x = 778,859.85 × 425,620.70
  4. Step 4: Simplify right side
    519,278.30x = 331,498,874,558.90
  5. Step 5: Solve for x
    x = 331,498,874,558.90/519,278.30
  6. Step 6: Final answer
    x = 638,383.84

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1.5x scale

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.