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Finding the Fourth Proportional to 479,296.71, 661,507.02 and 285,728.18

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Solution

The fourth proportional to 479,296.71, 661,507.02 and 285,728.18 is: 394,351.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,296.71 : 661,507.02 = 285,728.18 : x
  2. Step 2: Convert to fraction form
    479,296.71/661,507.02 = 285,728.18/x
  3. Step 3: Cross multiply
    479,296.71x = 661,507.02 × 285,728.18
  4. Step 4: Simplify right side
    479,296.71x = 189,011,193,574.29
  5. Step 5: Solve for x
    x = 189,011,193,574.29/479,296.71
  6. Step 6: Final answer
    x = 394,351.12

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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.