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Finding the Fourth Proportional to 438,803.09, 658,074.21 and 186,079.85

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Solution

The fourth proportional to 438,803.09, 658,074.21 and 186,079.85 is: 279,064.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,803.09 : 658,074.21 = 186,079.85 : x
  2. Step 2: Convert to fraction form
    438,803.09/658,074.21 = 186,079.85/x
  3. Step 3: Cross multiply
    438,803.09x = 658,074.21 × 186,079.85
  4. Step 4: Simplify right side
    438,803.09x = 122,454,346,995.30
  5. Step 5: Solve for x
    x = 122,454,346,995.30/438,803.09
  6. Step 6: Final answer
    x = 279,064.46

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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.