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Finding the Fourth Proportional to 328,563.56, 492,633.50 and 128,904.14

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Solution

The fourth proportional to 328,563.56, 492,633.50 and 128,904.14 is: 193,273.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,563.56 : 492,633.50 = 128,904.14 : x
  2. Step 2: Convert to fraction form
    328,563.56/492,633.50 = 128,904.14/x
  3. Step 3: Cross multiply
    328,563.56x = 492,633.50 × 128,904.14
  4. Step 4: Simplify right side
    328,563.56x = 63,502,494,545.00
  5. Step 5: Solve for x
    x = 63,502,494,545.00/328,563.56
  6. Step 6: Final answer
    x = 193,273.09

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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.