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Finding the Fourth Proportional to 1,991.27, 2,985.87 and 894.69

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Solution

The fourth proportional to 1,991.27, 2,985.87 and 894.69 is: 1,341.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.27 : 2,985.87 = 894.69 : x
  2. Step 2: Convert to fraction form
    1,991.27/2,985.87 = 894.69/x
  3. Step 3: Cross multiply
    1,991.27x = 2,985.87 × 894.69
  4. Step 4: Simplify right side
    1,991.27x = 2,671,428.03
  5. Step 5: Solve for x
    x = 2,671,428.03/1,991.27
  6. Step 6: Final answer
    x = 1,341.57

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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.