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Finding the Fourth Proportional to 521,581.48, 782,634.66 and 388,728.52

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Solution

The fourth proportional to 521,581.48, 782,634.66 and 388,728.52 is: 583,288.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,581.48 : 782,634.66 = 388,728.52 : x
  2. Step 2: Convert to fraction form
    521,581.48/782,634.66 = 388,728.52/x
  3. Step 3: Cross multiply
    521,581.48x = 782,634.66 × 388,728.52
  4. Step 4: Simplify right side
    521,581.48x = 304,232,413,082.50
  5. Step 5: Solve for x
    x = 304,232,413,082.50/521,581.48
  6. Step 6: Final answer
    x = 583,288.37

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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.