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Finding the Fourth Proportional to 490,685.77, 677,028.13 and 286,620.85

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Solution

The fourth proportional to 490,685.77, 677,028.13 and 286,620.85 is: 395,467.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,685.77 : 677,028.13 = 286,620.85 : x
  2. Step 2: Convert to fraction form
    490,685.77/677,028.13 = 286,620.85/x
  3. Step 3: Cross multiply
    490,685.77x = 677,028.13 × 286,620.85
  4. Step 4: Simplify right side
    490,685.77x = 194,050,378,094.51
  5. Step 5: Solve for x
    x = 194,050,378,094.51/490,685.77
  6. Step 6: Final answer
    x = 395,467.71

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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.