Home / 772,409.22-1,065,987.54-428,279.30

Finding the Fourth Proportional to 772,409.22, 1,065,987.54 and 428,279.30

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Solution

The fourth proportional to 772,409.22, 1,065,987.54 and 428,279.30 is: 591,060.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,409.22 : 1,065,987.54 = 428,279.30 : x
  2. Step 2: Convert to fraction form
    772,409.22/1,065,987.54 = 428,279.30/x
  3. Step 3: Cross multiply
    772,409.22x = 1,065,987.54 × 428,279.30
  4. Step 4: Simplify right side
    772,409.22x = 456,540,396,107.44
  5. Step 5: Solve for x
    x = 456,540,396,107.44/772,409.22
  6. Step 6: Final answer
    x = 591,060.27

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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.