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Finding the Fourth Proportional to 995.72, 1,493.58 and 418.19

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Solution

The fourth proportional to 995.72, 1,493.58 and 418.19 is: 627.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.72 : 1,493.58 = 418.19 : x
  2. Step 2: Convert to fraction form
    995.72/1,493.58 = 418.19/x
  3. Step 3: Cross multiply
    995.72x = 1,493.58 × 418.19
  4. Step 4: Simplify right side
    995.72x = 624,600.22
  5. Step 5: Solve for x
    x = 624,600.22/995.72
  6. Step 6: Final answer
    x = 627.29

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Double scale
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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.