Home / 3,136.30-4,705.12-1,287.42

Finding the Fourth Proportional to 3,136.30, 4,705.12 and 1,287.42

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Solution

The fourth proportional to 3,136.30, 4,705.12 and 1,287.42 is: 1,931.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,136.30 : 4,705.12 = 1,287.42 : x
  2. Step 2: Convert to fraction form
    3,136.30/4,705.12 = 1,287.42/x
  3. Step 3: Cross multiply
    3,136.30x = 4,705.12 × 1,287.42
  4. Step 4: Simplify right side
    3,136.30x = 6,057,465.59
  5. Step 5: Solve for x
    x = 6,057,465.59/3,136.30
  6. Step 6: Final answer
    x = 1,931.41

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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.