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Finding the Fourth Proportional to 392,015.60, 587,953.25 and 103,829.21

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Solution

The fourth proportional to 392,015.60, 587,953.25 and 103,829.21 is: 155,725.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,015.60 : 587,953.25 = 103,829.21 : x
  2. Step 2: Convert to fraction form
    392,015.60/587,953.25 = 103,829.21/x
  3. Step 3: Cross multiply
    392,015.60x = 587,953.25 × 103,829.21
  4. Step 4: Simplify right side
    392,015.60x = 61,046,718,005.52
  5. Step 5: Solve for x
    x = 61,046,718,005.52/392,015.60
  6. Step 6: Final answer
    x = 155,725.23

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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.