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Finding the Fourth Proportional to 1,366.94, 1,885.88 and 869.81

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Solution

The fourth proportional to 1,366.94, 1,885.88 and 869.81 is: 1,200.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.94 : 1,885.88 = 869.81 : x
  2. Step 2: Convert to fraction form
    1,366.94/1,885.88 = 869.81/x
  3. Step 3: Cross multiply
    1,366.94x = 1,885.88 × 869.81
  4. Step 4: Simplify right side
    1,366.94x = 1,640,350.03
  5. Step 5: Solve for x
    x = 1,640,350.03/1,366.94
  6. Step 6: Final answer
    x = 1,200.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.