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Finding the Fourth Proportional to 315,711.02, 435,687.63 and 172,480.34

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Solution

The fourth proportional to 315,711.02, 435,687.63 and 172,480.34 is: 238,026.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,711.02 : 435,687.63 = 172,480.34 : x
  2. Step 2: Convert to fraction form
    315,711.02/435,687.63 = 172,480.34/x
  3. Step 3: Cross multiply
    315,711.02x = 435,687.63 × 172,480.34
  4. Step 4: Simplify right side
    315,711.02x = 75,147,550,556.19
  5. Step 5: Solve for x
    x = 75,147,550,556.19/315,711.02
  6. Step 6: Final answer
    x = 238,026.38

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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.