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Finding the Fourth Proportional to 315,385.09, 435,224.49 and 172,147.52

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Solution

The fourth proportional to 315,385.09, 435,224.49 and 172,147.52 is: 237,559.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,385.09 : 435,224.49 = 172,147.52 : x
  2. Step 2: Convert to fraction form
    315,385.09/435,224.49 = 172,147.52/x
  3. Step 3: Cross multiply
    315,385.09x = 435,224.49 × 172,147.52
  4. Step 4: Simplify right side
    315,385.09x = 74,922,817,039.27
  5. Step 5: Solve for x
    x = 74,922,817,039.27/315,385.09
  6. Step 6: Final answer
    x = 237,559.80

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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.