Home / 487,919.89-673,742.78-306,690.19

Finding the Fourth Proportional to 487,919.89, 673,742.78 and 306,690.19

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Solution

The fourth proportional to 487,919.89, 673,742.78 and 306,690.19 is: 423,492.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,919.89 : 673,742.78 = 306,690.19 : x
  2. Step 2: Convert to fraction form
    487,919.89/673,742.78 = 306,690.19/x
  3. Step 3: Cross multiply
    487,919.89x = 673,742.78 × 306,690.19
  4. Step 4: Simplify right side
    487,919.89x = 206,630,301,209.33
  5. Step 5: Solve for x
    x = 206,630,301,209.33/487,919.89
  6. Step 6: Final answer
    x = 423,492.27

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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.