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Finding the Fourth Proportional to 1,668.95, 2,302.65 and 1,172

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Solution

The fourth proportional to 1,668.95, 2,302.65 and 1,172 is: 1,617.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.95 : 2,302.65 = 1,172 : x
  2. Step 2: Convert to fraction form
    1,668.95/2,302.65 = 1,172/x
  3. Step 3: Cross multiply
    1,668.95x = 2,302.65 × 1,172
  4. Step 4: Simplify right side
    1,668.95x = 2,698,705.80
  5. Step 5: Solve for x
    x = 2,698,705.80/1,668.95
  6. Step 6: Final answer
    x = 1,617.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.