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Finding the Fourth Proportional to 904.41, 1,241.04 and 821.25

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Solution

The fourth proportional to 904.41, 1,241.04 and 821.25 is: 1,126.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.41 : 1,241.04 = 821.25 : x
  2. Step 2: Convert to fraction form
    904.41/1,241.04 = 821.25/x
  3. Step 3: Cross multiply
    904.41x = 1,241.04 × 821.25
  4. Step 4: Simplify right side
    904.41x = 1,019,204.10
  5. Step 5: Solve for x
    x = 1,019,204.10/904.41
  6. Step 6: Final answer
    x = 1,126.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.