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Finding the Fourth Proportional to 613,825.20, 920,737.80 and 187,360.20

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Solution

The fourth proportional to 613,825.20, 920,737.80 and 187,360.20 is: 281,040.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,825.20 : 920,737.80 = 187,360.20 : x
  2. Step 2: Convert to fraction form
    613,825.20/920,737.80 = 187,360.20/x
  3. Step 3: Cross multiply
    613,825.20x = 920,737.80 × 187,360.20
  4. Step 4: Simplify right side
    613,825.20x = 172,509,618,355.56
  5. Step 5: Solve for x
    x = 172,509,618,355.56/613,825.20
  6. Step 6: Final answer
    x = 281,040.30

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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.