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Finding the Fourth Proportional to 2,208.64, 3,313.36 and 909.40

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Solution

The fourth proportional to 2,208.64, 3,313.36 and 909.40 is: 1,364.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.64 : 3,313.36 = 909.40 : x
  2. Step 2: Convert to fraction form
    2,208.64/3,313.36 = 909.40/x
  3. Step 3: Cross multiply
    2,208.64x = 3,313.36 × 909.40
  4. Step 4: Simplify right side
    2,208.64x = 3,013,169.58
  5. Step 5: Solve for x
    x = 3,013,169.58/2,208.64
  6. Step 6: Final answer
    x = 1,364.26

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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.