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Finding the Fourth Proportional to 3,325.71, 4,988.51 and 860.51

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Solution

The fourth proportional to 3,325.71, 4,988.51 and 860.51 is: 1,290.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,325.71 : 4,988.51 = 860.51 : x
  2. Step 2: Convert to fraction form
    3,325.71/4,988.51 = 860.51/x
  3. Step 3: Cross multiply
    3,325.71x = 4,988.51 × 860.51
  4. Step 4: Simplify right side
    3,325.71x = 4,292,633.50
  5. Step 5: Solve for x
    x = 4,292,633.50/3,325.71
  6. Step 6: Final answer
    x = 1,290.74

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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.