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Finding the Fourth Proportional to 403,860.20, 605,790.30 and 325,128.20

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Solution

The fourth proportional to 403,860.20, 605,790.30 and 325,128.20 is: 487,692.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,860.20 : 605,790.30 = 325,128.20 : x
  2. Step 2: Convert to fraction form
    403,860.20/605,790.30 = 325,128.20/x
  3. Step 3: Cross multiply
    403,860.20x = 605,790.30 × 325,128.20
  4. Step 4: Simplify right side
    403,860.20x = 196,959,509,816.46
  5. Step 5: Solve for x
    x = 196,959,509,816.46/403,860.20
  6. Step 6: Final answer
    x = 487,692.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.