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Finding the Fourth Proportional to 1,188.91, 1,782.91 and 822.59

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Solution

The fourth proportional to 1,188.91, 1,782.91 and 822.59 is: 1,233.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.91 : 1,782.91 = 822.59 : x
  2. Step 2: Convert to fraction form
    1,188.91/1,782.91 = 822.59/x
  3. Step 3: Cross multiply
    1,188.91x = 1,782.91 × 822.59
  4. Step 4: Simplify right side
    1,188.91x = 1,466,602.74
  5. Step 5: Solve for x
    x = 1,466,602.74/1,188.91
  6. Step 6: Final answer
    x = 1,233.57

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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.