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Finding the Fourth Proportional to 2,574.99, 3,861.81 and 931.23

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Solution

The fourth proportional to 2,574.99, 3,861.81 and 931.23 is: 1,396.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,574.99 : 3,861.81 = 931.23 : x
  2. Step 2: Convert to fraction form
    2,574.99/3,861.81 = 931.23/x
  3. Step 3: Cross multiply
    2,574.99x = 3,861.81 × 931.23
  4. Step 4: Simplify right side
    2,574.99x = 3,596,233.33
  5. Step 5: Solve for x
    x = 3,596,233.33/2,574.99
  6. Step 6: Final answer
    x = 1,396.60

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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.