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Finding the Fourth Proportional to 1,188.84, 1,782.98 and 669.06

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Solution

The fourth proportional to 1,188.84, 1,782.98 and 669.06 is: 1,003.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.84 : 1,782.98 = 669.06 : x
  2. Step 2: Convert to fraction form
    1,188.84/1,782.98 = 669.06/x
  3. Step 3: Cross multiply
    1,188.84x = 1,782.98 × 669.06
  4. Step 4: Simplify right side
    1,188.84x = 1,192,920.60
  5. Step 5: Solve for x
    x = 1,192,920.60/1,188.84
  6. Step 6: Final answer
    x = 1,003.43

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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.