Home / 487,919.39-673,742.09-306,689.69

Finding the Fourth Proportional to 487,919.39, 673,742.09 and 306,689.69

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Solution

The fourth proportional to 487,919.39, 673,742.09 and 306,689.69 is: 423,491.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,919.39 : 673,742.09 = 306,689.69 : x
  2. Step 2: Convert to fraction form
    487,919.39/673,742.09 = 306,689.69/x
  3. Step 3: Cross multiply
    487,919.39x = 673,742.09 × 306,689.69
  4. Step 4: Simplify right side
    487,919.39x = 206,629,752,722.05
  5. Step 5: Solve for x
    x = 206,629,752,722.05/487,919.39
  6. Step 6: Final answer
    x = 423,491.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.