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Finding the Fourth Proportional to 2,641.53, 3,962.72 and 909.75

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Solution

The fourth proportional to 2,641.53, 3,962.72 and 909.75 is: 1,364.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,641.53 : 3,962.72 = 909.75 : x
  2. Step 2: Convert to fraction form
    2,641.53/3,962.72 = 909.75/x
  3. Step 3: Cross multiply
    2,641.53x = 3,962.72 × 909.75
  4. Step 4: Simplify right side
    2,641.53x = 3,605,079.97
  5. Step 5: Solve for x
    x = 3,605,079.97/2,641.53
  6. Step 6: Final answer
    x = 1,364.77

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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.