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Finding the Fourth Proportional to 305,372.40, 421,367.88 and 174,540.60

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Solution

The fourth proportional to 305,372.40, 421,367.88 and 174,540.60 is: 240,839.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,372.40 : 421,367.88 = 174,540.60 : x
  2. Step 2: Convert to fraction form
    305,372.40/421,367.88 = 174,540.60/x
  3. Step 3: Cross multiply
    305,372.40x = 421,367.88 × 174,540.60
  4. Step 4: Simplify right side
    305,372.40x = 73,545,802,595.93
  5. Step 5: Solve for x
    x = 73,545,802,595.93/305,372.40
  6. Step 6: Final answer
    x = 240,839.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.