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Finding the Fourth Proportional to 285,638.81, 427,990.73 and 173,353.43

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Solution

The fourth proportional to 285,638.81, 427,990.73 and 173,353.43 is: 259,746.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,638.81 : 427,990.73 = 173,353.43 : x
  2. Step 2: Convert to fraction form
    285,638.81/427,990.73 = 173,353.43/x
  3. Step 3: Cross multiply
    285,638.81x = 427,990.73 × 173,353.43
  4. Step 4: Simplify right side
    285,638.81x = 74,193,661,256.91
  5. Step 5: Solve for x
    x = 74,193,661,256.91/285,638.81
  6. Step 6: Final answer
    x = 259,746.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.