Home / 777,743.75-1,073,286.78-420,047.75

Finding the Fourth Proportional to 777,743.75, 1,073,286.78 and 420,047.75

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Solution

The fourth proportional to 777,743.75, 1,073,286.78 and 420,047.75 is: 579,666.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,743.75 : 1,073,286.78 = 420,047.75 : x
  2. Step 2: Convert to fraction form
    777,743.75/1,073,286.78 = 420,047.75/x
  3. Step 3: Cross multiply
    777,743.75x = 1,073,286.78 × 420,047.75
  4. Step 4: Simplify right side
    777,743.75x = 450,831,697,043.75
  5. Step 5: Solve for x
    x = 450,831,697,043.75/777,743.75
  6. Step 6: Final answer
    x = 579,666.11

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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.