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Finding the Fourth Proportional to 365,354.75, 548,019.83 and 128,691.28

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Solution

The fourth proportional to 365,354.75, 548,019.83 and 128,691.28 is: 193,032.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,354.75 : 548,019.83 = 128,691.28 : x
  2. Step 2: Convert to fraction form
    365,354.75/548,019.83 = 128,691.28/x
  3. Step 3: Cross multiply
    365,354.75x = 548,019.83 × 128,691.28
  4. Step 4: Simplify right side
    365,354.75x = 70,525,373,670.95
  5. Step 5: Solve for x
    x = 70,525,373,670.95/365,354.75
  6. Step 6: Final answer
    x = 193,032.59

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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.