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Finding the Fourth Proportional to 1,069.92, 1,602 and 886.68

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Solution

The fourth proportional to 1,069.92, 1,602 and 886.68 is: 1,327.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.92 : 1,602 = 886.68 : x
  2. Step 2: Convert to fraction form
    1,069.92/1,602 = 886.68/x
  3. Step 3: Cross multiply
    1,069.92x = 1,602 × 886.68
  4. Step 4: Simplify right side
    1,069.92x = 1,420,461.36
  5. Step 5: Solve for x
    x = 1,420,461.36/1,069.92
  6. Step 6: Final answer
    x = 1,327.63

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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.