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Finding the Fourth Proportional to 1,369.94, 2,055.72 and 548.08

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Solution

The fourth proportional to 1,369.94, 2,055.72 and 548.08 is: 822.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.94 : 2,055.72 = 548.08 : x
  2. Step 2: Convert to fraction form
    1,369.94/2,055.72 = 548.08/x
  3. Step 3: Cross multiply
    1,369.94x = 2,055.72 × 548.08
  4. Step 4: Simplify right side
    1,369.94x = 1,126,699.02
  5. Step 5: Solve for x
    x = 1,126,699.02/1,369.94
  6. Step 6: Final answer
    x = 822.44

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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.