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Finding the Fourth Proportional to 1,453.13, 2,179.47 and 631.19

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Solution

The fourth proportional to 1,453.13, 2,179.47 and 631.19 is: 946.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,453.13 : 2,179.47 = 631.19 : x
  2. Step 2: Convert to fraction form
    1,453.13/2,179.47 = 631.19/x
  3. Step 3: Cross multiply
    1,453.13x = 2,179.47 × 631.19
  4. Step 4: Simplify right side
    1,453.13x = 1,375,646.41
  5. Step 5: Solve for x
    x = 1,375,646.41/1,453.13
  6. Step 6: Final answer
    x = 946.68

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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.