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Finding the Fourth Proportional to 3,051.68, 4,577.79 and 860.43

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Solution

The fourth proportional to 3,051.68, 4,577.79 and 860.43 is: 1,290.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,051.68 : 4,577.79 = 860.43 : x
  2. Step 2: Convert to fraction form
    3,051.68/4,577.79 = 860.43/x
  3. Step 3: Cross multiply
    3,051.68x = 4,577.79 × 860.43
  4. Step 4: Simplify right side
    3,051.68x = 3,938,867.85
  5. Step 5: Solve for x
    x = 3,938,867.85/3,051.68
  6. Step 6: Final answer
    x = 1,290.72

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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.