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Finding the Fourth Proportional to 665,300.79, 997,958.48 and 191,990.25

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Solution

The fourth proportional to 665,300.79, 997,958.48 and 191,990.25 is: 287,987.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,300.79 : 997,958.48 = 191,990.25 : x
  2. Step 2: Convert to fraction form
    665,300.79/997,958.48 = 191,990.25/x
  3. Step 3: Cross multiply
    665,300.79x = 997,958.48 × 191,990.25
  4. Step 4: Simplify right side
    665,300.79x = 191,598,297,104.87
  5. Step 5: Solve for x
    x = 191,598,297,104.87/665,300.79
  6. Step 6: Final answer
    x = 287,987.48

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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.