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Finding the Fourth Proportional to 216,387.86, 298,629.39 and 143,676.91

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Solution

The fourth proportional to 216,387.86, 298,629.39 and 143,676.91 is: 198,283.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,387.86 : 298,629.39 = 143,676.91 : x
  2. Step 2: Convert to fraction form
    216,387.86/298,629.39 = 143,676.91/x
  3. Step 3: Cross multiply
    216,387.86x = 298,629.39 × 143,676.91
  4. Step 4: Simplify right side
    216,387.86x = 42,906,147,990.38
  5. Step 5: Solve for x
    x = 42,906,147,990.38/216,387.86
  6. Step 6: Final answer
    x = 198,283.53

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1.5x scale

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.