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Finding the Fourth Proportional to 5,978.50, 8,969.19 and 1,874.50

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Solution

The fourth proportional to 5,978.50, 8,969.19 and 1,874.50 is: 2,812.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,978.50 : 8,969.19 = 1,874.50 : x
  2. Step 2: Convert to fraction form
    5,978.50/8,969.19 = 1,874.50/x
  3. Step 3: Cross multiply
    5,978.50x = 8,969.19 × 1,874.50
  4. Step 4: Simplify right side
    5,978.50x = 16,812,746.66
  5. Step 5: Solve for x
    x = 16,812,746.66/5,978.50
  6. Step 6: Final answer
    x = 2,812.20

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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.