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Finding the Fourth Proportional to 846.34, 1,263.25 and 786.25

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Solution

The fourth proportional to 846.34, 1,263.25 and 786.25 is: 1,173.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.34 : 1,263.25 = 786.25 : x
  2. Step 2: Convert to fraction form
    846.34/1,263.25 = 786.25/x
  3. Step 3: Cross multiply
    846.34x = 1,263.25 × 786.25
  4. Step 4: Simplify right side
    846.34x = 993,230.31
  5. Step 5: Solve for x
    x = 993,230.31/846.34
  6. Step 6: Final answer
    x = 1,173.56

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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.