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Finding the Fourth Proportional to 717,198.74, 989,756.03 and 394,920.36

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Solution

The fourth proportional to 717,198.74, 989,756.03 and 394,920.36 is: 545,002.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,198.74 : 989,756.03 = 394,920.36 : x
  2. Step 2: Convert to fraction form
    717,198.74/989,756.03 = 394,920.36/x
  3. Step 3: Cross multiply
    717,198.74x = 989,756.03 × 394,920.36
  4. Step 4: Simplify right side
    717,198.74x = 390,874,806,445.65
  5. Step 5: Solve for x
    x = 390,874,806,445.65/717,198.74
  6. Step 6: Final answer
    x = 545,002.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.