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Finding the Fourth Proportional to 1,188.40, 1,782.60 and 571.96

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Solution

The fourth proportional to 1,188.40, 1,782.60 and 571.96 is: 857.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.40 : 1,782.60 = 571.96 : x
  2. Step 2: Convert to fraction form
    1,188.40/1,782.60 = 571.96/x
  3. Step 3: Cross multiply
    1,188.40x = 1,782.60 × 571.96
  4. Step 4: Simplify right side
    1,188.40x = 1,019,575.90
  5. Step 5: Solve for x
    x = 1,019,575.90/1,188.40
  6. Step 6: Final answer
    x = 857.94

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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.