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Finding the Fourth Proportional to 1,424.97, 1,965.57 and 864.89

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Solution

The fourth proportional to 1,424.97, 1,965.57 and 864.89 is: 1,193.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.97 : 1,965.57 = 864.89 : x
  2. Step 2: Convert to fraction form
    1,424.97/1,965.57 = 864.89/x
  3. Step 3: Cross multiply
    1,424.97x = 1,965.57 × 864.89
  4. Step 4: Simplify right side
    1,424.97x = 1,699,998.90
  5. Step 5: Solve for x
    x = 1,699,998.90/1,424.97
  6. Step 6: Final answer
    x = 1,193.01

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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.