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Finding the Fourth Proportional to 517,288.87, 713,858.56 and 287,860.92

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Solution

The fourth proportional to 517,288.87, 713,858.56 and 287,860.92 is: 397,248.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,288.87 : 713,858.56 = 287,860.92 : x
  2. Step 2: Convert to fraction form
    517,288.87/713,858.56 = 287,860.92/x
  3. Step 3: Cross multiply
    517,288.87x = 713,858.56 × 287,860.92
  4. Step 4: Simplify right side
    517,288.87x = 205,491,981,831.48
  5. Step 5: Solve for x
    x = 205,491,981,831.48/517,288.87
  6. Step 6: Final answer
    x = 397,248.02

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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.