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Finding the Fourth Proportional to 4,770.88, 7,156.72 and 2,689.72

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Solution

The fourth proportional to 4,770.88, 7,156.72 and 2,689.72 is: 4,034.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,770.88 : 7,156.72 = 2,689.72 : x
  2. Step 2: Convert to fraction form
    4,770.88/7,156.72 = 2,689.72/x
  3. Step 3: Cross multiply
    4,770.88x = 7,156.72 × 2,689.72
  4. Step 4: Simplify right side
    4,770.88x = 19,249,572.92
  5. Step 5: Solve for x
    x = 19,249,572.92/4,770.88
  6. Step 6: Final answer
    x = 4,034.81

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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.