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Finding the Fourth Proportional to 328,562.06, 492,631.25 and 128,902.64

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Solution

The fourth proportional to 328,562.06, 492,631.25 and 128,902.64 is: 193,270.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,562.06 : 492,631.25 = 128,902.64 : x
  2. Step 2: Convert to fraction form
    328,562.06/492,631.25 = 128,902.64/x
  3. Step 3: Cross multiply
    328,562.06x = 492,631.25 × 128,902.64
  4. Step 4: Simplify right side
    328,562.06x = 63,501,465,563.83
  5. Step 5: Solve for x
    x = 63,501,465,563.83/328,562.06
  6. Step 6: Final answer
    x = 193,270.84

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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.