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Finding the Fourth Proportional to 900.36, 1,241.88 and 551.22

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Solution

The fourth proportional to 900.36, 1,241.88 and 551.22 is: 760.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.36 : 1,241.88 = 551.22 : x
  2. Step 2: Convert to fraction form
    900.36/1,241.88 = 551.22/x
  3. Step 3: Cross multiply
    900.36x = 1,241.88 × 551.22
  4. Step 4: Simplify right side
    900.36x = 684,549.09
  5. Step 5: Solve for x
    x = 684,549.09/900.36
  6. Step 6: Final answer
    x = 760.31

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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.