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Finding the Fourth Proportional to 1,143.87, 1,577.10 and 933.83

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Solution

The fourth proportional to 1,143.87, 1,577.10 and 933.83 is: 1,287.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.87 : 1,577.10 = 933.83 : x
  2. Step 2: Convert to fraction form
    1,143.87/1,577.10 = 933.83/x
  3. Step 3: Cross multiply
    1,143.87x = 1,577.10 × 933.83
  4. Step 4: Simplify right side
    1,143.87x = 1,472,743.29
  5. Step 5: Solve for x
    x = 1,472,743.29/1,143.87
  6. Step 6: Final answer
    x = 1,287.51

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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.