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Finding the Fourth Proportional to 315,845.28, 435,866.68 and 172,605.32

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Solution

The fourth proportional to 315,845.28, 435,866.68 and 172,605.32 is: 238,195.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,845.28 : 435,866.68 = 172,605.32 : x
  2. Step 2: Convert to fraction form
    315,845.28/435,866.68 = 172,605.32/x
  3. Step 3: Cross multiply
    315,845.28x = 435,866.68 × 172,605.32
  4. Step 4: Simplify right side
    315,845.28x = 75,232,907,778.74
  5. Step 5: Solve for x
    x = 75,232,907,778.74/315,845.28
  6. Step 6: Final answer
    x = 238,195.45

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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.