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Finding the Fourth Proportional to 900.96, 1,241.28 and 675.92

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Solution

The fourth proportional to 900.96, 1,241.28 and 675.92 is: 931.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.96 : 1,241.28 = 675.92 : x
  2. Step 2: Convert to fraction form
    900.96/1,241.28 = 675.92/x
  3. Step 3: Cross multiply
    900.96x = 1,241.28 × 675.92
  4. Step 4: Simplify right side
    900.96x = 839,005.98
  5. Step 5: Solve for x
    x = 839,005.98/900.96
  6. Step 6: Final answer
    x = 931.24

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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.