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Finding the Fourth Proportional to 604,498.80, 905,711.40 and 394,028.40

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Solution

The fourth proportional to 604,498.80, 905,711.40 and 394,028.40 is: 590,366.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,498.80 : 905,711.40 = 394,028.40 : x
  2. Step 2: Convert to fraction form
    604,498.80/905,711.40 = 394,028.40/x
  3. Step 3: Cross multiply
    604,498.80x = 905,711.40 × 394,028.40
  4. Step 4: Simplify right side
    604,498.80x = 356,876,013,803.76
  5. Step 5: Solve for x
    x = 356,876,013,803.76/604,498.80
  6. Step 6: Final answer
    x = 590,366.79

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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.