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Finding the Fourth Proportional to 3,611.25, 5,416.88 and 875.25

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Solution

The fourth proportional to 3,611.25, 5,416.88 and 875.25 is: 1,312.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.25 : 5,416.88 = 875.25 : x
  2. Step 2: Convert to fraction form
    3,611.25/5,416.88 = 875.25/x
  3. Step 3: Cross multiply
    3,611.25x = 5,416.88 × 875.25
  4. Step 4: Simplify right side
    3,611.25x = 4,741,119.84
  5. Step 5: Solve for x
    x = 4,741,119.84/3,611.25
  6. Step 6: Final answer
    x = 1,312.88

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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.