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Finding the Fourth Proportional to 493,715.28, 681,329.28 and 278,857.92

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Solution

The fourth proportional to 493,715.28, 681,329.28 and 278,857.92 is: 384,825.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,715.28 : 681,329.28 = 278,857.92 : x
  2. Step 2: Convert to fraction form
    493,715.28/681,329.28 = 278,857.92/x
  3. Step 3: Cross multiply
    493,715.28x = 681,329.28 × 278,857.92
  4. Step 4: Simplify right side
    493,715.28x = 189,994,065,855.90
  5. Step 5: Solve for x
    x = 189,994,065,855.90/493,715.28
  6. Step 6: Final answer
    x = 384,825.17

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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.