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Finding the Fourth Proportional to 720,445.52, 994,216.41 and 393,763.77

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Solution

The fourth proportional to 720,445.52, 994,216.41 and 393,763.77 is: 543,394.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,445.52 : 994,216.41 = 393,763.77 : x
  2. Step 2: Convert to fraction form
    720,445.52/994,216.41 = 393,763.77/x
  3. Step 3: Cross multiply
    720,445.52x = 994,216.41 × 393,763.77
  4. Step 4: Simplify right side
    720,445.52x = 391,486,401,797.47
  5. Step 5: Solve for x
    x = 391,486,401,797.47/720,445.52
  6. Step 6: Final answer
    x = 543,394.88

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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.