Home / 815,423.80-1,223,135.70-254,385.40

Finding the Fourth Proportional to 815,423.80, 1,223,135.70 and 254,385.40

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Solution

The fourth proportional to 815,423.80, 1,223,135.70 and 254,385.40 is: 381,578.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,423.80 : 1,223,135.70 = 254,385.40 : x
  2. Step 2: Convert to fraction form
    815,423.80/1,223,135.70 = 254,385.40/x
  3. Step 3: Cross multiply
    815,423.80x = 1,223,135.70 × 254,385.40
  4. Step 4: Simplify right side
    815,423.80x = 311,147,864,298.78
  5. Step 5: Solve for x
    x = 311,147,864,298.78/815,423.80
  6. Step 6: Final answer
    x = 381,578.10

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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.