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Finding the Fourth Proportional to 1,668.57, 2,503.53 and 847.09

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Solution

The fourth proportional to 1,668.57, 2,503.53 and 847.09 is: 1,270.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.57 : 2,503.53 = 847.09 : x
  2. Step 2: Convert to fraction form
    1,668.57/2,503.53 = 847.09/x
  3. Step 3: Cross multiply
    1,668.57x = 2,503.53 × 847.09
  4. Step 4: Simplify right side
    1,668.57x = 2,120,715.23
  5. Step 5: Solve for x
    x = 2,120,715.23/1,668.57
  6. Step 6: Final answer
    x = 1,270.98

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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.