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Finding the Fourth Proportional to 479,500.19, 661,796.09 and 285,920.42

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Solution

The fourth proportional to 479,500.19, 661,796.09 and 285,920.42 is: 394,621.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,500.19 : 661,796.09 = 285,920.42 : x
  2. Step 2: Convert to fraction form
    479,500.19/661,796.09 = 285,920.42/x
  3. Step 3: Cross multiply
    479,500.19x = 661,796.09 × 285,920.42
  4. Step 4: Simplify right side
    479,500.19x = 189,221,012,340.78
  5. Step 5: Solve for x
    x = 189,221,012,340.78/479,500.19
  6. Step 6: Final answer
    x = 394,621.35

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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.