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Finding the Fourth Proportional to 315,989.76, 436,063.14 and 172,749.36

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Solution

The fourth proportional to 315,989.76, 436,063.14 and 172,749.36 is: 238,392.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,989.76 : 436,063.14 = 172,749.36 : x
  2. Step 2: Convert to fraction form
    315,989.76/436,063.14 = 172,749.36/x
  3. Step 3: Cross multiply
    315,989.76x = 436,063.14 × 172,749.36
  4. Step 4: Simplify right side
    315,989.76x = 75,329,628,354.59
  5. Step 5: Solve for x
    x = 75,329,628,354.59/315,989.76
  6. Step 6: Final answer
    x = 238,392.62

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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.