Home / 1,424.20-2,136.30-654.70

Finding the Fourth Proportional to 1,424.20, 2,136.30 and 654.70

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Solution

The fourth proportional to 1,424.20, 2,136.30 and 654.70 is: 982.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.20 : 2,136.30 = 654.70 : x
  2. Step 2: Convert to fraction form
    1,424.20/2,136.30 = 654.70/x
  3. Step 3: Cross multiply
    1,424.20x = 2,136.30 × 654.70
  4. Step 4: Simplify right side
    1,424.20x = 1,398,635.61
  5. Step 5: Solve for x
    x = 1,398,635.61/1,424.20
  6. Step 6: Final answer
    x = 982.05

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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.