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Finding the Fourth Proportional to 1,074.30, 1,611.45 and 995.10

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Solution

The fourth proportional to 1,074.30, 1,611.45 and 995.10 is: 1,492.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.30 : 1,611.45 = 995.10 : x
  2. Step 2: Convert to fraction form
    1,074.30/1,611.45 = 995.10/x
  3. Step 3: Cross multiply
    1,074.30x = 1,611.45 × 995.10
  4. Step 4: Simplify right side
    1,074.30x = 1,603,553.90
  5. Step 5: Solve for x
    x = 1,603,553.90/1,074.30
  6. Step 6: Final answer
    x = 1,492.65

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Double scale
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Similar ratio
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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.