Home / 328,629.80-492,580.20-128,883.80

Finding the Fourth Proportional to 328,629.80, 492,580.20 and 128,883.80

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Solution

The fourth proportional to 328,629.80, 492,580.20 and 128,883.80 is: 193,182.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,629.80 : 492,580.20 = 128,883.80 : x
  2. Step 2: Convert to fraction form
    328,629.80/492,580.20 = 128,883.80/x
  3. Step 3: Cross multiply
    328,629.80x = 492,580.20 × 128,883.80
  4. Step 4: Simplify right side
    328,629.80x = 63,485,607,980.76
  5. Step 5: Solve for x
    x = 63,485,607,980.76/328,629.80
  6. Step 6: Final answer
    x = 193,182.75

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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.