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Finding the Fourth Proportional to 1,368.92, 1,887.72 and 995.24

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Solution

The fourth proportional to 1,368.92, 1,887.72 and 995.24 is: 1,372.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.92 : 1,887.72 = 995.24 : x
  2. Step 2: Convert to fraction form
    1,368.92/1,887.72 = 995.24/x
  3. Step 3: Cross multiply
    1,368.92x = 1,887.72 × 995.24
  4. Step 4: Simplify right side
    1,368.92x = 1,878,734.45
  5. Step 5: Solve for x
    x = 1,878,734.45/1,368.92
  6. Step 6: Final answer
    x = 1,372.42

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.