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Finding the Fourth Proportional to 2,144.80, 3,217.35 and 912.07

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Solution

The fourth proportional to 2,144.80, 3,217.35 and 912.07 is: 1,368.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,144.80 : 3,217.35 = 912.07 : x
  2. Step 2: Convert to fraction form
    2,144.80/3,217.35 = 912.07/x
  3. Step 3: Cross multiply
    2,144.80x = 3,217.35 × 912.07
  4. Step 4: Simplify right side
    2,144.80x = 2,934,448.41
  5. Step 5: Solve for x
    x = 2,934,448.41/2,144.80
  6. Step 6: Final answer
    x = 1,368.17

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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.