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Finding the Fourth Proportional to 328,266.60, 492,399.90 and 281,027.40

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Solution

The fourth proportional to 328,266.60, 492,399.90 and 281,027.40 is: 421,541.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,266.60 : 492,399.90 = 281,027.40 : x
  2. Step 2: Convert to fraction form
    328,266.60/492,399.90 = 281,027.40/x
  3. Step 3: Cross multiply
    328,266.60x = 492,399.90 × 281,027.40
  4. Step 4: Simplify right side
    328,266.60x = 138,377,863,657.26
  5. Step 5: Solve for x
    x = 138,377,863,657.26/328,266.60
  6. Step 6: Final answer
    x = 421,541.10

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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.