Home / 777,890.64-1,073,489.10-420,194.64

Finding the Fourth Proportional to 777,890.64, 1,073,489.10 and 420,194.64

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Solution

The fourth proportional to 777,890.64, 1,073,489.10 and 420,194.64 is: 579,868.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,890.64 : 1,073,489.10 = 420,194.64 : x
  2. Step 2: Convert to fraction form
    777,890.64/1,073,489.10 = 420,194.64/x
  3. Step 3: Cross multiply
    777,890.64x = 1,073,489.10 × 420,194.64
  4. Step 4: Simplify right side
    777,890.64x = 451,074,365,918.42
  5. Step 5: Solve for x
    x = 451,074,365,918.42/777,890.64
  6. Step 6: Final answer
    x = 579,868.61

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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.