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Finding the Fourth Proportional to 366,387.72, 505,362.60 and 257,722.56

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Solution

The fourth proportional to 366,387.72, 505,362.60 and 257,722.56 is: 355,479.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    366,387.72 : 505,362.60 = 257,722.56 : x
  2. Step 2: Convert to fraction form
    366,387.72/505,362.60 = 257,722.56/x
  3. Step 3: Cross multiply
    366,387.72x = 505,362.60 × 257,722.56
  4. Step 4: Simplify right side
    366,387.72x = 130,243,343,000.26
  5. Step 5: Solve for x
    x = 130,243,343,000.26/366,387.72
  6. Step 6: Final answer
    x = 355,479.55

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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.