Home / 1,576.40-2,175.44-986.99

Finding the Fourth Proportional to 1,576.40, 2,175.44 and 986.99

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Solution

The fourth proportional to 1,576.40, 2,175.44 and 986.99 is: 1,362.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,576.40 : 2,175.44 = 986.99 : x
  2. Step 2: Convert to fraction form
    1,576.40/2,175.44 = 986.99/x
  3. Step 3: Cross multiply
    1,576.40x = 2,175.44 × 986.99
  4. Step 4: Simplify right side
    1,576.40x = 2,147,121.71
  5. Step 5: Solve for x
    x = 2,147,121.71/1,576.40
  6. Step 6: Final answer
    x = 1,362.05

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1.5x scale

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.