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Finding the Fourth Proportional to 1,424.24, 2,136.60 and 992.24

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Solution

The fourth proportional to 1,424.24, 2,136.60 and 992.24 is: 1,488.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.24 : 2,136.60 = 992.24 : x
  2. Step 2: Convert to fraction form
    1,424.24/2,136.60 = 992.24/x
  3. Step 3: Cross multiply
    1,424.24x = 2,136.60 × 992.24
  4. Step 4: Simplify right side
    1,424.24x = 2,120,019.98
  5. Step 5: Solve for x
    x = 2,120,019.98/1,424.24
  6. Step 6: Final answer
    x = 1,488.53

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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.