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Finding the Fourth Proportional to 1,305.84, 1,800.42 and 955.92

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Solution

The fourth proportional to 1,305.84, 1,800.42 and 955.92 is: 1,317.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.84 : 1,800.42 = 955.92 : x
  2. Step 2: Convert to fraction form
    1,305.84/1,800.42 = 955.92/x
  3. Step 3: Cross multiply
    1,305.84x = 1,800.42 × 955.92
  4. Step 4: Simplify right side
    1,305.84x = 1,721,057.49
  5. Step 5: Solve for x
    x = 1,721,057.49/1,305.84
  6. Step 6: Final answer
    x = 1,317.97

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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.