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Finding the Fourth Proportional to 1,668.44, 2,503.20 and 572.78

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Solution

The fourth proportional to 1,668.44, 2,503.20 and 572.78 is: 859.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.44 : 2,503.20 = 572.78 : x
  2. Step 2: Convert to fraction form
    1,668.44/2,503.20 = 572.78/x
  3. Step 3: Cross multiply
    1,668.44x = 2,503.20 × 572.78
  4. Step 4: Simplify right side
    1,668.44x = 1,433,782.90
  5. Step 5: Solve for x
    x = 1,433,782.90/1,668.44
  6. Step 6: Final answer
    x = 859.36

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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.