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Finding the Fourth Proportional to 940.08, 1,403.64 and 906.48

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Solution

The fourth proportional to 940.08, 1,403.64 and 906.48 is: 1,353.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.08 : 1,403.64 = 906.48 : x
  2. Step 2: Convert to fraction form
    940.08/1,403.64 = 906.48/x
  3. Step 3: Cross multiply
    940.08x = 1,403.64 × 906.48
  4. Step 4: Simplify right side
    940.08x = 1,272,371.59
  5. Step 5: Solve for x
    x = 1,272,371.59/940.08
  6. Step 6: Final answer
    x = 1,353.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.