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Finding the Fourth Proportional to 403,065.20, 604,986.60 and 203,610.80

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Solution

The fourth proportional to 403,065.20, 604,986.60 and 203,610.80 is: 305,612.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,065.20 : 604,986.60 = 203,610.80 : x
  2. Step 2: Convert to fraction form
    403,065.20/604,986.60 = 203,610.80/x
  3. Step 3: Cross multiply
    403,065.20x = 604,986.60 × 203,610.80
  4. Step 4: Simplify right side
    403,065.20x = 123,181,805,615.28
  5. Step 5: Solve for x
    x = 123,181,805,615.28/403,065.20
  6. Step 6: Final answer
    x = 305,612.60

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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.