Home / 420,819.60-631,229.40-326,816.40

Finding the Fourth Proportional to 420,819.60, 631,229.40 and 326,816.40

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Solution

The fourth proportional to 420,819.60, 631,229.40 and 326,816.40 is: 490,224.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,819.60 : 631,229.40 = 326,816.40 : x
  2. Step 2: Convert to fraction form
    420,819.60/631,229.40 = 326,816.40/x
  3. Step 3: Cross multiply
    420,819.60x = 631,229.40 × 326,816.40
  4. Step 4: Simplify right side
    420,819.60x = 206,296,120,082.16
  5. Step 5: Solve for x
    x = 206,296,120,082.16/420,819.60
  6. Step 6: Final answer
    x = 490,224.60

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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.