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Finding the Fourth Proportional to 913.07, 1,362.97 and 845.39

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Solution

The fourth proportional to 913.07, 1,362.97 and 845.39 is: 1,261.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.07 : 1,362.97 = 845.39 : x
  2. Step 2: Convert to fraction form
    913.07/1,362.97 = 845.39/x
  3. Step 3: Cross multiply
    913.07x = 1,362.97 × 845.39
  4. Step 4: Simplify right side
    913.07x = 1,152,241.21
  5. Step 5: Solve for x
    x = 1,152,241.21/913.07
  6. Step 6: Final answer
    x = 1,261.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.