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Finding the Fourth Proportional to 2,077.50, 3,114.60 and 981.60

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Solution

The fourth proportional to 2,077.50, 3,114.60 and 981.60 is: 1,471.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,077.50 : 3,114.60 = 981.60 : x
  2. Step 2: Convert to fraction form
    2,077.50/3,114.60 = 981.60/x
  3. Step 3: Cross multiply
    2,077.50x = 3,114.60 × 981.60
  4. Step 4: Simplify right side
    2,077.50x = 3,057,291.36
  5. Step 5: Solve for x
    x = 3,057,291.36/2,077.50
  6. Step 6: Final answer
    x = 1,471.62

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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.