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Finding the Fourth Proportional to 4,909.80, 7,372.10 and 4,223.94

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Solution

The fourth proportional to 4,909.80, 7,372.10 and 4,223.94 is: 6,342.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,909.80 : 7,372.10 = 4,223.94 : x
  2. Step 2: Convert to fraction form
    4,909.80/7,372.10 = 4,223.94/x
  3. Step 3: Cross multiply
    4,909.80x = 7,372.10 × 4,223.94
  4. Step 4: Simplify right side
    4,909.80x = 31,139,308.07
  5. Step 5: Solve for x
    x = 31,139,308.07/4,909.80
  6. Step 6: Final answer
    x = 6,342.28

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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.