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Finding the Fourth Proportional to 1,189.20, 1,782.92 and 572.33

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Solution

The fourth proportional to 1,189.20, 1,782.92 and 572.33 is: 858.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.20 : 1,782.92 = 572.33 : x
  2. Step 2: Convert to fraction form
    1,189.20/1,782.92 = 572.33/x
  3. Step 3: Cross multiply
    1,189.20x = 1,782.92 × 572.33
  4. Step 4: Simplify right side
    1,189.20x = 1,020,406.83
  5. Step 5: Solve for x
    x = 1,020,406.83/1,189.20
  6. Step 6: Final answer
    x = 858.06

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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.