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Finding the Fourth Proportional to 1,377.02, 1,901.39 and 1,272.08

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Solution

The fourth proportional to 1,377.02, 1,901.39 and 1,272.08 is: 1,756.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.02 : 1,901.39 = 1,272.08 : x
  2. Step 2: Convert to fraction form
    1,377.02/1,901.39 = 1,272.08/x
  3. Step 3: Cross multiply
    1,377.02x = 1,901.39 × 1,272.08
  4. Step 4: Simplify right side
    1,377.02x = 2,418,704.32
  5. Step 5: Solve for x
    x = 2,418,704.32/1,377.02
  6. Step 6: Final answer
    x = 1,756.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.