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Finding the Fourth Proportional to 3,131.98, 4,697.98 and 940.72

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Solution

The fourth proportional to 3,131.98, 4,697.98 and 940.72 is: 1,411.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.98 : 4,697.98 = 940.72 : x
  2. Step 2: Convert to fraction form
    3,131.98/4,697.98 = 940.72/x
  3. Step 3: Cross multiply
    3,131.98x = 4,697.98 × 940.72
  4. Step 4: Simplify right side
    3,131.98x = 4,419,483.75
  5. Step 5: Solve for x
    x = 4,419,483.75/3,131.98
  6. Step 6: Final answer
    x = 1,411.08

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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.