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Finding the Fourth Proportional to 1,293.75, 1,941.42 and 831.82

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Solution

The fourth proportional to 1,293.75, 1,941.42 and 831.82 is: 1,248.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.75 : 1,941.42 = 831.82 : x
  2. Step 2: Convert to fraction form
    1,293.75/1,941.42 = 831.82/x
  3. Step 3: Cross multiply
    1,293.75x = 1,941.42 × 831.82
  4. Step 4: Simplify right side
    1,293.75x = 1,614,909.21
  5. Step 5: Solve for x
    x = 1,614,909.21/1,293.75
  6. Step 6: Final answer
    x = 1,248.24

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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.