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Finding the Fourth Proportional to 1,322.47, 1,825.75 and 903.43

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Solution

The fourth proportional to 1,322.47, 1,825.75 and 903.43 is: 1,247.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.47 : 1,825.75 = 903.43 : x
  2. Step 2: Convert to fraction form
    1,322.47/1,825.75 = 903.43/x
  3. Step 3: Cross multiply
    1,322.47x = 1,825.75 × 903.43
  4. Step 4: Simplify right side
    1,322.47x = 1,649,428.19
  5. Step 5: Solve for x
    x = 1,649,428.19/1,322.47
  6. Step 6: Final answer
    x = 1,247.24

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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.