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Finding the Fourth Proportional to 318,141.96, 438,889.61 and 281,880.14

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Solution

The fourth proportional to 318,141.96, 438,889.61 and 281,880.14 is: 388,864.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,141.96 : 438,889.61 = 281,880.14 : x
  2. Step 2: Convert to fraction form
    318,141.96/438,889.61 = 281,880.14/x
  3. Step 3: Cross multiply
    318,141.96x = 438,889.61 × 281,880.14
  4. Step 4: Simplify right side
    318,141.96x = 123,714,264,711.35
  5. Step 5: Solve for x
    x = 123,714,264,711.35/318,141.96
  6. Step 6: Final answer
    x = 388,864.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.