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Finding the Fourth Proportional to 2,987.55, 4,478.11 and 1,892.23

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Solution

The fourth proportional to 2,987.55, 4,478.11 and 1,892.23 is: 2,836.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.55 : 4,478.11 = 1,892.23 : x
  2. Step 2: Convert to fraction form
    2,987.55/4,478.11 = 1,892.23/x
  3. Step 3: Cross multiply
    2,987.55x = 4,478.11 × 1,892.23
  4. Step 4: Simplify right side
    2,987.55x = 8,473,614.09
  5. Step 5: Solve for x
    x = 8,473,614.09/2,987.55
  6. Step 6: Final answer
    x = 2,836.31

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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.