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Finding the Fourth Proportional to 2,664.49, 3,996.60 and 909.40

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Solution

The fourth proportional to 2,664.49, 3,996.60 and 909.40 is: 1,364.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,664.49 : 3,996.60 = 909.40 : x
  2. Step 2: Convert to fraction form
    2,664.49/3,996.60 = 909.40/x
  3. Step 3: Cross multiply
    2,664.49x = 3,996.60 × 909.40
  4. Step 4: Simplify right side
    2,664.49x = 3,634,508.04
  5. Step 5: Solve for x
    x = 3,634,508.04/2,664.49
  6. Step 6: Final answer
    x = 1,364.05

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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.