Home / 764,705.30-1,055,269.15-420,540.16

Finding the Fourth Proportional to 764,705.30, 1,055,269.15 and 420,540.16

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Solution

The fourth proportional to 764,705.30, 1,055,269.15 and 420,540.16 is: 580,332.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,705.30 : 1,055,269.15 = 420,540.16 : x
  2. Step 2: Convert to fraction form
    764,705.30/1,055,269.15 = 420,540.16/x
  3. Step 3: Cross multiply
    764,705.30x = 1,055,269.15 × 420,540.16
  4. Step 4: Simplify right side
    764,705.30x = 443,783,053,494.54
  5. Step 5: Solve for x
    x = 443,783,053,494.54/764,705.30
  6. Step 6: Final answer
    x = 580,332.13

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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.