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Finding the Fourth Proportional to 1,991.54, 2,985.07 and 966.26

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Solution

The fourth proportional to 1,991.54, 2,985.07 and 966.26 is: 1,448.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.54 : 2,985.07 = 966.26 : x
  2. Step 2: Convert to fraction form
    1,991.54/2,985.07 = 966.26/x
  3. Step 3: Cross multiply
    1,991.54x = 2,985.07 × 966.26
  4. Step 4: Simplify right side
    1,991.54x = 2,884,353.74
  5. Step 5: Solve for x
    x = 2,884,353.74/1,991.54
  6. Step 6: Final answer
    x = 1,448.30

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1.5x scale

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.