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Finding the Fourth Proportional to 1,236.49, 1,854.19 and 620.49

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Solution

The fourth proportional to 1,236.49, 1,854.19 and 620.49 is: 930.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.49 : 1,854.19 = 620.49 : x
  2. Step 2: Convert to fraction form
    1,236.49/1,854.19 = 620.49/x
  3. Step 3: Cross multiply
    1,236.49x = 1,854.19 × 620.49
  4. Step 4: Simplify right side
    1,236.49x = 1,150,506.35
  5. Step 5: Solve for x
    x = 1,150,506.35/1,236.49
  6. Step 6: Final answer
    x = 930.46

Related Problems

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Half scale
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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.