Home / 685,408.51-1,028,358.78-306,297.55

Finding the Fourth Proportional to 685,408.51, 1,028,358.78 and 306,297.55

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Solution

The fourth proportional to 685,408.51, 1,028,358.78 and 306,297.55 is: 459,556.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,408.51 : 1,028,358.78 = 306,297.55 : x
  2. Step 2: Convert to fraction form
    685,408.51/1,028,358.78 = 306,297.55/x
  3. Step 3: Cross multiply
    685,408.51x = 1,028,358.78 × 306,297.55
  4. Step 4: Simplify right side
    685,408.51x = 314,983,774,834.99
  5. Step 5: Solve for x
    x = 314,983,774,834.99/685,408.51
  6. Step 6: Final answer
    x = 459,556.26

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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.