Home / 815,078.16-1,222,682.76-309,880.80

Finding the Fourth Proportional to 815,078.16, 1,222,682.76 and 309,880.80

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Solution

The fourth proportional to 815,078.16, 1,222,682.76 and 309,880.80 is: 464,846.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,078.16 : 1,222,682.76 = 309,880.80 : x
  2. Step 2: Convert to fraction form
    815,078.16/1,222,682.76 = 309,880.80/x
  3. Step 3: Cross multiply
    815,078.16x = 1,222,682.76 × 309,880.80
  4. Step 4: Simplify right side
    815,078.16x = 378,885,911,815.01
  5. Step 5: Solve for x
    x = 378,885,911,815.01/815,078.16
  6. Step 6: Final answer
    x = 464,846.11

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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.