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Finding the Fourth Proportional to 3,161.88, 4,742.67 and 970.63

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Solution

The fourth proportional to 3,161.88, 4,742.67 and 970.63 is: 1,455.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.88 : 4,742.67 = 970.63 : x
  2. Step 2: Convert to fraction form
    3,161.88/4,742.67 = 970.63/x
  3. Step 3: Cross multiply
    3,161.88x = 4,742.67 × 970.63
  4. Step 4: Simplify right side
    3,161.88x = 4,603,377.78
  5. Step 5: Solve for x
    x = 4,603,377.78/3,161.88
  6. Step 6: Final answer
    x = 1,455.90

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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.