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Finding the Fourth Proportional to 1,086.30, 1,626.54 and 572.22

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Solution

The fourth proportional to 1,086.30, 1,626.54 and 572.22 is: 856.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.30 : 1,626.54 = 572.22 : x
  2. Step 2: Convert to fraction form
    1,086.30/1,626.54 = 572.22/x
  3. Step 3: Cross multiply
    1,086.30x = 1,626.54 × 572.22
  4. Step 4: Simplify right side
    1,086.30x = 930,738.72
  5. Step 5: Solve for x
    x = 930,738.72/1,086.30
  6. Step 6: Final answer
    x = 856.80

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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.