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Finding the Fourth Proportional to 483,705.86, 725,575.18 and 128,720.22

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Solution

The fourth proportional to 483,705.86, 725,575.18 and 128,720.22 is: 193,084.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,705.86 : 725,575.18 = 128,720.22 : x
  2. Step 2: Convert to fraction form
    483,705.86/725,575.18 = 128,720.22/x
  3. Step 3: Cross multiply
    483,705.86x = 725,575.18 × 128,720.22
  4. Step 4: Simplify right side
    483,705.86x = 93,396,196,796.14
  5. Step 5: Solve for x
    x = 93,396,196,796.14/483,705.86
  6. Step 6: Final answer
    x = 193,084.69

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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.