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Finding the Fourth Proportional to 412,925.67, 618,970.28 and 279,819.45

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Solution

The fourth proportional to 412,925.67, 618,970.28 and 279,819.45 is: 419,445.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,925.67 : 618,970.28 = 279,819.45 : x
  2. Step 2: Convert to fraction form
    412,925.67/618,970.28 = 279,819.45/x
  3. Step 3: Cross multiply
    412,925.67x = 618,970.28 × 279,819.45
  4. Step 4: Simplify right side
    412,925.67x = 173,199,921,916.85
  5. Step 5: Solve for x
    x = 173,199,921,916.85/412,925.67
  6. Step 6: Final answer
    x = 419,445.76

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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.