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Finding the Fourth Proportional to 638,574.87, 956,778.37 and 385,323.21

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Solution

The fourth proportional to 638,574.87, 956,778.37 and 385,323.21 is: 577,330.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,574.87 : 956,778.37 = 385,323.21 : x
  2. Step 2: Convert to fraction form
    638,574.87/956,778.37 = 385,323.21/x
  3. Step 3: Cross multiply
    638,574.87x = 956,778.37 × 385,323.21
  4. Step 4: Simplify right side
    638,574.87x = 368,668,912,786.97
  5. Step 5: Solve for x
    x = 368,668,912,786.97/638,574.87
  6. Step 6: Final answer
    x = 577,330.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.