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Finding the Fourth Proportional to 1,249.92, 1,874.16 and 427.50

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Solution

The fourth proportional to 1,249.92, 1,874.16 and 427.50 is: 641.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.92 : 1,874.16 = 427.50 : x
  2. Step 2: Convert to fraction form
    1,249.92/1,874.16 = 427.50/x
  3. Step 3: Cross multiply
    1,249.92x = 1,874.16 × 427.50
  4. Step 4: Simplify right side
    1,249.92x = 801,203.40
  5. Step 5: Solve for x
    x = 801,203.40/1,249.92
  6. Step 6: Final answer
    x = 641.00

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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.