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Finding the Fourth Proportional to 351,615.32, 485,109.78 and 198,631.16

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Solution

The fourth proportional to 351,615.32, 485,109.78 and 198,631.16 is: 274,043.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,615.32 : 485,109.78 = 198,631.16 : x
  2. Step 2: Convert to fraction form
    351,615.32/485,109.78 = 198,631.16/x
  3. Step 3: Cross multiply
    351,615.32x = 485,109.78 × 198,631.16
  4. Step 4: Simplify right side
    351,615.32x = 96,357,918,328.74
  5. Step 5: Solve for x
    x = 96,357,918,328.74/351,615.32
  6. Step 6: Final answer
    x = 274,043.57

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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.