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Finding the Fourth Proportional to 1,025.81, 1,540.22 and 637.47

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Solution

The fourth proportional to 1,025.81, 1,540.22 and 637.47 is: 957.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.81 : 1,540.22 = 637.47 : x
  2. Step 2: Convert to fraction form
    1,025.81/1,540.22 = 637.47/x
  3. Step 3: Cross multiply
    1,025.81x = 1,540.22 × 637.47
  4. Step 4: Simplify right side
    1,025.81x = 981,840.86
  5. Step 5: Solve for x
    x = 981,840.86/1,025.81
  6. Step 6: Final answer
    x = 957.13

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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.