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Finding the Fourth Proportional to 901.82, 1,241.79 and 770.54

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Solution

The fourth proportional to 901.82, 1,241.79 and 770.54 is: 1,061.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.82 : 1,241.79 = 770.54 : x
  2. Step 2: Convert to fraction form
    901.82/1,241.79 = 770.54/x
  3. Step 3: Cross multiply
    901.82x = 1,241.79 × 770.54
  4. Step 4: Simplify right side
    901.82x = 956,848.87
  5. Step 5: Solve for x
    x = 956,848.87/901.82
  6. Step 6: Final answer
    x = 1,061.02

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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.