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Finding the Fourth Proportional to 1,375.45, 2,055.93 and 1,342.64

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Solution

The fourth proportional to 1,375.45, 2,055.93 and 1,342.64 is: 2,006.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.45 : 2,055.93 = 1,342.64 : x
  2. Step 2: Convert to fraction form
    1,375.45/2,055.93 = 1,342.64/x
  3. Step 3: Cross multiply
    1,375.45x = 2,055.93 × 1,342.64
  4. Step 4: Simplify right side
    1,375.45x = 2,760,373.86
  5. Step 5: Solve for x
    x = 2,760,373.86/1,375.45
  6. Step 6: Final answer
    x = 2,006.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.