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Finding the Fourth Proportional to 391,803.45, 587,926.62 and 167,142.66

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Solution

The fourth proportional to 391,803.45, 587,926.62 and 167,142.66 is: 250,808.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,803.45 : 587,926.62 = 167,142.66 : x
  2. Step 2: Convert to fraction form
    391,803.45/587,926.62 = 167,142.66/x
  3. Step 3: Cross multiply
    391,803.45x = 587,926.62 × 167,142.66
  4. Step 4: Simplify right side
    391,803.45x = 98,267,619,151.61
  5. Step 5: Solve for x
    x = 98,267,619,151.61/391,803.45
  6. Step 6: Final answer
    x = 250,808.46

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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.