Home / 1,574.55-2,172.89-985.43

Finding the Fourth Proportional to 1,574.55, 2,172.89 and 985.43

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Solution

The fourth proportional to 1,574.55, 2,172.89 and 985.43 is: 1,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.55 : 2,172.89 = 985.43 : x
  2. Step 2: Convert to fraction form
    1,574.55/2,172.89 = 985.43/x
  3. Step 3: Cross multiply
    1,574.55x = 2,172.89 × 985.43
  4. Step 4: Simplify right side
    1,574.55x = 2,141,230.99
  5. Step 5: Solve for x
    x = 2,141,230.99/1,574.55
  6. Step 6: Final answer
    x = 1,359.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.