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Finding the Fourth Proportional to 3,457.68, 5,186.51 and 860.62

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Solution

The fourth proportional to 3,457.68, 5,186.51 and 860.62 is: 1,290.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,457.68 : 5,186.51 = 860.62 : x
  2. Step 2: Convert to fraction form
    3,457.68/5,186.51 = 860.62/x
  3. Step 3: Cross multiply
    3,457.68x = 5,186.51 × 860.62
  4. Step 4: Simplify right side
    3,457.68x = 4,463,614.24
  5. Step 5: Solve for x
    x = 4,463,614.24/3,457.68
  6. Step 6: Final answer
    x = 1,290.93

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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.