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Finding the Fourth Proportional to 1,090.28, 1,504.36 and 648.32

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Solution

The fourth proportional to 1,090.28, 1,504.36 and 648.32 is: 894.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.28 : 1,504.36 = 648.32 : x
  2. Step 2: Convert to fraction form
    1,090.28/1,504.36 = 648.32/x
  3. Step 3: Cross multiply
    1,090.28x = 1,504.36 × 648.32
  4. Step 4: Simplify right side
    1,090.28x = 975,306.68
  5. Step 5: Solve for x
    x = 975,306.68/1,090.28
  6. Step 6: Final answer
    x = 894.55

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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.