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Finding the Fourth Proportional to 315,660, 435,608.22 and 172,420.08

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Solution

The fourth proportional to 315,660, 435,608.22 and 172,420.08 is: 237,938.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,660 : 435,608.22 = 172,420.08 : x
  2. Step 2: Convert to fraction form
    315,660/435,608.22 = 172,420.08/x
  3. Step 3: Cross multiply
    315,660x = 435,608.22 × 172,420.08
  4. Step 4: Simplify right side
    315,660x = 75,107,604,141.06
  5. Step 5: Solve for x
    x = 75,107,604,141.06/315,660
  6. Step 6: Final answer
    x = 237,938.30

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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.