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Finding the Fourth Proportional to 1,442.93, 2,164.50 and 518.49

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Solution

The fourth proportional to 1,442.93, 2,164.50 and 518.49 is: 777.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.93 : 2,164.50 = 518.49 : x
  2. Step 2: Convert to fraction form
    1,442.93/2,164.50 = 518.49/x
  3. Step 3: Cross multiply
    1,442.93x = 2,164.50 × 518.49
  4. Step 4: Simplify right side
    1,442.93x = 1,122,269.01
  5. Step 5: Solve for x
    x = 1,122,269.01/1,442.93
  6. Step 6: Final answer
    x = 777.77

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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.