Home / 1,668.39-2,500.15-938.18

Finding the Fourth Proportional to 1,668.39, 2,500.15 and 938.18

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Solution

The fourth proportional to 1,668.39, 2,500.15 and 938.18 is: 1,405.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.39 : 2,500.15 = 938.18 : x
  2. Step 2: Convert to fraction form
    1,668.39/2,500.15 = 938.18/x
  3. Step 3: Cross multiply
    1,668.39x = 2,500.15 × 938.18
  4. Step 4: Simplify right side
    1,668.39x = 2,345,578.23
  5. Step 5: Solve for x
    x = 2,345,578.23/1,668.39
  6. Step 6: Final answer
    x = 1,405.89

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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.