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Finding the Fourth Proportional to 1,424.49, 2,136.72 and 558.18

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Solution

The fourth proportional to 1,424.49, 2,136.72 and 558.18 is: 837.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.49 : 2,136.72 = 558.18 : x
  2. Step 2: Convert to fraction form
    1,424.49/2,136.72 = 558.18/x
  3. Step 3: Cross multiply
    1,424.49x = 2,136.72 × 558.18
  4. Step 4: Simplify right side
    1,424.49x = 1,192,674.37
  5. Step 5: Solve for x
    x = 1,192,674.37/1,424.49
  6. Step 6: Final answer
    x = 837.26

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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.