Home / 767,990-1,059,826.20-428,458.16

Finding the Fourth Proportional to 767,990, 1,059,826.20 and 428,458.16

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Solution

The fourth proportional to 767,990, 1,059,826.20 and 428,458.16 is: 591,272.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    767,990 : 1,059,826.20 = 428,458.16 : x
  2. Step 2: Convert to fraction form
    767,990/1,059,826.20 = 428,458.16/x
  3. Step 3: Cross multiply
    767,990x = 1,059,826.20 × 428,458.16
  4. Step 4: Simplify right side
    767,990x = 454,091,183,571.79
  5. Step 5: Solve for x
    x = 454,091,183,571.79/767,990
  6. Step 6: Final answer
    x = 591,272.26

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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.