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Finding the Fourth Proportional to 380,990.98, 571,220.79 and 167,656.42

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Solution

The fourth proportional to 380,990.98, 571,220.79 and 167,656.42 is: 251,367.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,990.98 : 571,220.79 = 167,656.42 : x
  2. Step 2: Convert to fraction form
    380,990.98/571,220.79 = 167,656.42/x
  3. Step 3: Cross multiply
    380,990.98x = 571,220.79 × 167,656.42
  4. Step 4: Simplify right side
    380,990.98x = 95,768,832,680.97
  5. Step 5: Solve for x
    x = 95,768,832,680.97/380,990.98
  6. Step 6: Final answer
    x = 251,367.72

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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.