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Finding the Fourth Proportional to 1,414.96, 1,953.81 and 918.45

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Solution

The fourth proportional to 1,414.96, 1,953.81 and 918.45 is: 1,268.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.96 : 1,953.81 = 918.45 : x
  2. Step 2: Convert to fraction form
    1,414.96/1,953.81 = 918.45/x
  3. Step 3: Cross multiply
    1,414.96x = 1,953.81 × 918.45
  4. Step 4: Simplify right side
    1,414.96x = 1,794,476.79
  5. Step 5: Solve for x
    x = 1,794,476.79/1,414.96
  6. Step 6: Final answer
    x = 1,268.22

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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.