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Finding the Fourth Proportional to 427,282.35, 640,923.53 and 427,282.35

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Solution

The fourth proportional to 427,282.35, 640,923.53 and 427,282.35 is: 640,923.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,282.35 : 640,923.53 = 427,282.35 : x
  2. Step 2: Convert to fraction form
    427,282.35/640,923.53 = 427,282.35/x
  3. Step 3: Cross multiply
    427,282.35x = 640,923.53 × 427,282.35
  4. Step 4: Simplify right side
    427,282.35x = 273,855,309,932.28
  5. Step 5: Solve for x
    x = 273,855,309,932.28/427,282.35
  6. Step 6: Final answer
    x = 640,923.53

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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.