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Finding the Fourth Proportional to 519,218.90, 778,824.57 and 279,445.40

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Solution

The fourth proportional to 519,218.90, 778,824.57 and 279,445.40 is: 419,166.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,218.90 : 778,824.57 = 279,445.40 : x
  2. Step 2: Convert to fraction form
    519,218.90/778,824.57 = 279,445.40/x
  3. Step 3: Cross multiply
    519,218.90x = 778,824.57 × 279,445.40
  4. Step 4: Simplify right side
    519,218.90x = 217,638,943,493.48
  5. Step 5: Solve for x
    x = 217,638,943,493.48/519,218.90
  6. Step 6: Final answer
    x = 419,166.07

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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.