Home / 815,039.40-1,222,559.10-215,999.40

Finding the Fourth Proportional to 815,039.40, 1,222,559.10 and 215,999.40

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Solution

The fourth proportional to 815,039.40, 1,222,559.10 and 215,999.40 is: 323,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,039.40 : 1,222,559.10 = 215,999.40 : x
  2. Step 2: Convert to fraction form
    815,039.40/1,222,559.10 = 215,999.40/x
  3. Step 3: Cross multiply
    815,039.40x = 1,222,559.10 × 215,999.40
  4. Step 4: Simplify right side
    815,039.40x = 264,072,032,064.54
  5. Step 5: Solve for x
    x = 264,072,032,064.54/815,039.40
  6. Step 6: Final answer
    x = 323,999.10

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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.