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Finding the Fourth Proportional to 1,988.99, 2,973.98 and 1,814.72

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Solution

The fourth proportional to 1,988.99, 2,973.98 and 1,814.72 is: 2,713.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.99 : 2,973.98 = 1,814.72 : x
  2. Step 2: Convert to fraction form
    1,988.99/2,973.98 = 1,814.72/x
  3. Step 3: Cross multiply
    1,988.99x = 2,973.98 × 1,814.72
  4. Step 4: Simplify right side
    1,988.99x = 5,396,917.04
  5. Step 5: Solve for x
    x = 5,396,917.04/1,988.99
  6. Step 6: Final answer
    x = 2,713.40

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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.