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Finding the Fourth Proportional to 1,188.96, 1,782.56 and 572.08

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Solution

The fourth proportional to 1,188.96, 1,782.56 and 572.08 is: 857.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.96 : 1,782.56 = 572.08 : x
  2. Step 2: Convert to fraction form
    1,188.96/1,782.56 = 572.08/x
  3. Step 3: Cross multiply
    1,188.96x = 1,782.56 × 572.08
  4. Step 4: Simplify right side
    1,188.96x = 1,019,766.92
  5. Step 5: Solve for x
    x = 1,019,766.92/1,188.96
  6. Step 6: Final answer
    x = 857.70

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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.