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Finding the Fourth Proportional to 545,198.40, 817,117.20 and 279,064.80

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Solution

The fourth proportional to 545,198.40, 817,117.20 and 279,064.80 is: 418,248.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,198.40 : 817,117.20 = 279,064.80 : x
  2. Step 2: Convert to fraction form
    545,198.40/817,117.20 = 279,064.80/x
  3. Step 3: Cross multiply
    545,198.40x = 817,117.20 × 279,064.80
  4. Step 4: Simplify right side
    545,198.40x = 228,028,647,994.56
  5. Step 5: Solve for x
    x = 228,028,647,994.56/545,198.40
  6. Step 6: Final answer
    x = 418,248.93

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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.