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Finding the Fourth Proportional to 3,415.59, 5,122.80 and 949.76

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Solution

The fourth proportional to 3,415.59, 5,122.80 and 949.76 is: 1,424.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.59 : 5,122.80 = 949.76 : x
  2. Step 2: Convert to fraction form
    3,415.59/5,122.80 = 949.76/x
  3. Step 3: Cross multiply
    3,415.59x = 5,122.80 × 949.76
  4. Step 4: Simplify right side
    3,415.59x = 4,865,404.91
  5. Step 5: Solve for x
    x = 4,865,404.91/3,415.59
  6. Step 6: Final answer
    x = 1,424.47

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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.