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Finding the Fourth Proportional to 663,199.72, 915,216.78 and 361,393.72

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Solution

The fourth proportional to 663,199.72, 915,216.78 and 361,393.72 is: 498,723.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,199.72 : 915,216.78 = 361,393.72 : x
  2. Step 2: Convert to fraction form
    663,199.72/915,216.78 = 361,393.72/x
  3. Step 3: Cross multiply
    663,199.72x = 915,216.78 × 361,393.72
  4. Step 4: Simplify right side
    663,199.72x = 330,753,596,730.62
  5. Step 5: Solve for x
    x = 330,753,596,730.62/663,199.72
  6. Step 6: Final answer
    x = 498,723.97

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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.