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Finding the Fourth Proportional to 3,131.55, 4,698.14 and 940.23

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Solution

The fourth proportional to 3,131.55, 4,698.14 and 940.23 is: 1,410.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.55 : 4,698.14 = 940.23 : x
  2. Step 2: Convert to fraction form
    3,131.55/4,698.14 = 940.23/x
  3. Step 3: Cross multiply
    3,131.55x = 4,698.14 × 940.23
  4. Step 4: Simplify right side
    3,131.55x = 4,417,327.47
  5. Step 5: Solve for x
    x = 4,417,327.47/3,131.55
  6. Step 6: Final answer
    x = 1,410.59

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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.