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Finding the Fourth Proportional to 5,274.88, 7,914.14 and 1,988.91

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Solution

The fourth proportional to 5,274.88, 7,914.14 and 1,988.91 is: 2,984.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,274.88 : 7,914.14 = 1,988.91 : x
  2. Step 2: Convert to fraction form
    5,274.88/7,914.14 = 1,988.91/x
  3. Step 3: Cross multiply
    5,274.88x = 7,914.14 × 1,988.91
  4. Step 4: Simplify right side
    5,274.88x = 15,740,543.15
  5. Step 5: Solve for x
    x = 15,740,543.15/5,274.88
  6. Step 6: Final answer
    x = 2,984.06

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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.