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Finding the Fourth Proportional to 3,100.40, 4,650.96 and 909.08

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Solution

The fourth proportional to 3,100.40, 4,650.96 and 909.08 is: 1,363.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.40 : 4,650.96 = 909.08 : x
  2. Step 2: Convert to fraction form
    3,100.40/4,650.96 = 909.08/x
  3. Step 3: Cross multiply
    3,100.40x = 4,650.96 × 909.08
  4. Step 4: Simplify right side
    3,100.40x = 4,228,094.72
  5. Step 5: Solve for x
    x = 4,228,094.72/3,100.40
  6. Step 6: Final answer
    x = 1,363.73

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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.