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Finding the Fourth Proportional to 403,485.30, 605,307.70 and 119,180.80

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Solution

The fourth proportional to 403,485.30, 605,307.70 and 119,180.80 is: 178,794.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,485.30 : 605,307.70 = 119,180.80 : x
  2. Step 2: Convert to fraction form
    403,485.30/605,307.70 = 119,180.80/x
  3. Step 3: Cross multiply
    403,485.30x = 605,307.70 × 119,180.80
  4. Step 4: Simplify right side
    403,485.30x = 72,141,055,932.16
  5. Step 5: Solve for x
    x = 72,141,055,932.16/403,485.30
  6. Step 6: Final answer
    x = 178,794.76

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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.