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Finding the Fourth Proportional to 1,442.76, 2,163.51 and 518.10

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Solution

The fourth proportional to 1,442.76, 2,163.51 and 518.10 is: 776.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.76 : 2,163.51 = 518.10 : x
  2. Step 2: Convert to fraction form
    1,442.76/2,163.51 = 518.10/x
  3. Step 3: Cross multiply
    1,442.76x = 2,163.51 × 518.10
  4. Step 4: Simplify right side
    1,442.76x = 1,120,914.53
  5. Step 5: Solve for x
    x = 1,120,914.53/1,442.76
  6. Step 6: Final answer
    x = 776.92

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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.