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Finding the Fourth Proportional to 642,191.63, 886,224.51 and 355,730.27

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Solution

The fourth proportional to 642,191.63, 886,224.51 and 355,730.27 is: 490,907.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,191.63 : 886,224.51 = 355,730.27 : x
  2. Step 2: Convert to fraction form
    642,191.63/886,224.51 = 355,730.27/x
  3. Step 3: Cross multiply
    642,191.63x = 886,224.51 × 355,730.27
  4. Step 4: Simplify right side
    642,191.63x = 315,256,879,791.80
  5. Step 5: Solve for x
    x = 315,256,879,791.80/642,191.63
  6. Step 6: Final answer
    x = 490,907.80

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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.