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Finding the Fourth Proportional to 315,628, 435,566.62 and 172,388.38

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Solution

The fourth proportional to 315,628, 435,566.62 and 172,388.38 is: 237,895.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,628 : 435,566.62 = 172,388.38 : x
  2. Step 2: Convert to fraction form
    315,628/435,566.62 = 172,388.38/x
  3. Step 3: Cross multiply
    315,628x = 435,566.62 × 172,388.38
  4. Step 4: Simplify right side
    315,628x = 75,086,624,003.88
  5. Step 5: Solve for x
    x = 75,086,624,003.88/315,628
  6. Step 6: Final answer
    x = 237,895.95

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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.