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Finding the Fourth Proportional to 5,274.29, 7,911.98 and 1,990.15

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Solution

The fourth proportional to 5,274.29, 7,911.98 and 1,990.15 is: 2,985.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,274.29 : 7,911.98 = 1,990.15 : x
  2. Step 2: Convert to fraction form
    5,274.29/7,911.98 = 1,990.15/x
  3. Step 3: Cross multiply
    5,274.29x = 7,911.98 × 1,990.15
  4. Step 4: Simplify right side
    5,274.29x = 15,746,027.00
  5. Step 5: Solve for x
    x = 15,746,027.00/5,274.29
  6. Step 6: Final answer
    x = 2,985.43

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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.