Home / 815,041.72-1,222,504.84-215,989.60

Finding the Fourth Proportional to 815,041.72, 1,222,504.84 and 215,989.60

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Solution

The fourth proportional to 815,041.72, 1,222,504.84 and 215,989.60 is: 323,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,041.72 : 1,222,504.84 = 215,989.60 : x
  2. Step 2: Convert to fraction form
    815,041.72/1,222,504.84 = 215,989.60/x
  3. Step 3: Cross multiply
    815,041.72x = 1,222,504.84 × 215,989.60
  4. Step 4: Simplify right side
    815,041.72x = 264,048,331,389.66
  5. Step 5: Solve for x
    x = 264,048,331,389.66/815,041.72
  6. Step 6: Final answer
    x = 323,969.10

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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.