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Finding the Fourth Proportional to 1,267.41, 1,901.13 and 618.21

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Solution

The fourth proportional to 1,267.41, 1,901.13 and 618.21 is: 927.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.41 : 1,901.13 = 618.21 : x
  2. Step 2: Convert to fraction form
    1,267.41/1,901.13 = 618.21/x
  3. Step 3: Cross multiply
    1,267.41x = 1,901.13 × 618.21
  4. Step 4: Simplify right side
    1,267.41x = 1,175,297.58
  5. Step 5: Solve for x
    x = 1,175,297.58/1,267.41
  6. Step 6: Final answer
    x = 927.32

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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.