Home / 815,424.80-1,223,137.20-254,386.40

Finding the Fourth Proportional to 815,424.80, 1,223,137.20 and 254,386.40

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Solution

The fourth proportional to 815,424.80, 1,223,137.20 and 254,386.40 is: 381,579.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,424.80 : 1,223,137.20 = 254,386.40 : x
  2. Step 2: Convert to fraction form
    815,424.80/1,223,137.20 = 254,386.40/x
  3. Step 3: Cross multiply
    815,424.80x = 1,223,137.20 × 254,386.40
  4. Step 4: Simplify right side
    815,424.80x = 311,149,469,014.08
  5. Step 5: Solve for x
    x = 311,149,469,014.08/815,424.80
  6. Step 6: Final answer
    x = 381,579.60

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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.