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Finding the Fourth Proportional to 3,104.67, 4,656.80 and 913.21

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Solution

The fourth proportional to 3,104.67, 4,656.80 and 913.21 is: 1,369.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,104.67 : 4,656.80 = 913.21 : x
  2. Step 2: Convert to fraction form
    3,104.67/4,656.80 = 913.21/x
  3. Step 3: Cross multiply
    3,104.67x = 4,656.80 × 913.21
  4. Step 4: Simplify right side
    3,104.67x = 4,252,636.33
  5. Step 5: Solve for x
    x = 4,252,636.33/3,104.67
  6. Step 6: Final answer
    x = 1,369.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.