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Finding the Fourth Proportional to 1,424.36, 2,136.36 and 384.45

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Solution

The fourth proportional to 1,424.36, 2,136.36 and 384.45 is: 576.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.36 : 2,136.36 = 384.45 : x
  2. Step 2: Convert to fraction form
    1,424.36/2,136.36 = 384.45/x
  3. Step 3: Cross multiply
    1,424.36x = 2,136.36 × 384.45
  4. Step 4: Simplify right side
    1,424.36x = 821,323.60
  5. Step 5: Solve for x
    x = 821,323.60/1,424.36
  6. Step 6: Final answer
    x = 576.63

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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.