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Finding the Fourth Proportional to 4,742.69, 7,115.15 and 1,622.72

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Solution

The fourth proportional to 4,742.69, 7,115.15 and 1,622.72 is: 2,434.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,742.69 : 7,115.15 = 1,622.72 : x
  2. Step 2: Convert to fraction form
    4,742.69/7,115.15 = 1,622.72/x
  3. Step 3: Cross multiply
    4,742.69x = 7,115.15 × 1,622.72
  4. Step 4: Simplify right side
    4,742.69x = 11,545,905.88
  5. Step 5: Solve for x
    x = 11,545,905.88/4,742.69
  6. Step 6: Final answer
    x = 2,434.47

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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.