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Finding the Fourth Proportional to 1,668.84, 2,499.36 and 845.12

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Solution

The fourth proportional to 1,668.84, 2,499.36 and 845.12 is: 1,265.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.84 : 2,499.36 = 845.12 : x
  2. Step 2: Convert to fraction form
    1,668.84/2,499.36 = 845.12/x
  3. Step 3: Cross multiply
    1,668.84x = 2,499.36 × 845.12
  4. Step 4: Simplify right side
    1,668.84x = 2,112,246.63
  5. Step 5: Solve for x
    x = 2,112,246.63/1,668.84
  6. Step 6: Final answer
    x = 1,265.70

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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.