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Finding the Fourth Proportional to 720,031.20, 993,623.81 and 397,734.36

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Solution

The fourth proportional to 720,031.20, 993,623.81 and 397,734.36 is: 548,862.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,031.20 : 993,623.81 = 397,734.36 : x
  2. Step 2: Convert to fraction form
    720,031.20/993,623.81 = 397,734.36/x
  3. Step 3: Cross multiply
    720,031.20x = 993,623.81 × 397,734.36
  4. Step 4: Simplify right side
    720,031.20x = 395,198,328,162.44
  5. Step 5: Solve for x
    x = 395,198,328,162.44/720,031.20
  6. Step 6: Final answer
    x = 548,862.78

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1.5x scale

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.