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Finding the Fourth Proportional to 253,639.87, 380,447.95 and 103,843.13

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Solution

The fourth proportional to 253,639.87, 380,447.95 and 103,843.13 is: 155,759.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,639.87 : 380,447.95 = 103,843.13 : x
  2. Step 2: Convert to fraction form
    253,639.87/380,447.95 = 103,843.13/x
  3. Step 3: Cross multiply
    253,639.87x = 380,447.95 × 103,843.13
  4. Step 4: Simplify right side
    253,639.87x = 39,506,904,027.84
  5. Step 5: Solve for x
    x = 39,506,904,027.84/253,639.87
  6. Step 6: Final answer
    x = 155,759.84

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1.5x scale

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.