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Finding the Fourth Proportional to 2,580.34, 3,870.99 and 850.18

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Solution

The fourth proportional to 2,580.34, 3,870.99 and 850.18 is: 1,275.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,580.34 : 3,870.99 = 850.18 : x
  2. Step 2: Convert to fraction form
    2,580.34/3,870.99 = 850.18/x
  3. Step 3: Cross multiply
    2,580.34x = 3,870.99 × 850.18
  4. Step 4: Simplify right side
    2,580.34x = 3,291,038.28
  5. Step 5: Solve for x
    x = 3,291,038.28/2,580.34
  6. Step 6: Final answer
    x = 1,275.43

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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.