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Finding the Fourth Proportional to 1,369.64, 2,055.99 and 548.48

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Solution

The fourth proportional to 1,369.64, 2,055.99 and 548.48 is: 823.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.64 : 2,055.99 = 548.48 : x
  2. Step 2: Convert to fraction form
    1,369.64/2,055.99 = 548.48/x
  3. Step 3: Cross multiply
    1,369.64x = 2,055.99 × 548.48
  4. Step 4: Simplify right side
    1,369.64x = 1,127,669.40
  5. Step 5: Solve for x
    x = 1,127,669.40/1,369.64
  6. Step 6: Final answer
    x = 823.33

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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.