Home / 815,410.80-1,223,116.20-254,372.40

Finding the Fourth Proportional to 815,410.80, 1,223,116.20 and 254,372.40

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Solution

The fourth proportional to 815,410.80, 1,223,116.20 and 254,372.40 is: 381,558.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,410.80 : 1,223,116.20 = 254,372.40 : x
  2. Step 2: Convert to fraction form
    815,410.80/1,223,116.20 = 254,372.40/x
  3. Step 3: Cross multiply
    815,410.80x = 1,223,116.20 × 254,372.40
  4. Step 4: Simplify right side
    815,410.80x = 311,127,003,272.88
  5. Step 5: Solve for x
    x = 311,127,003,272.88/815,410.80
  6. Step 6: Final answer
    x = 381,558.60

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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.