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Finding the Fourth Proportional to 326,038.56, 489,131.28 and 115,676.16

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Solution

The fourth proportional to 326,038.56, 489,131.28 and 115,676.16 is: 173,540.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,038.56 : 489,131.28 = 115,676.16 : x
  2. Step 2: Convert to fraction form
    326,038.56/489,131.28 = 115,676.16/x
  3. Step 3: Cross multiply
    326,038.56x = 489,131.28 × 115,676.16
  4. Step 4: Simplify right side
    326,038.56x = 56,580,828,206.28
  5. Step 5: Solve for x
    x = 56,580,828,206.28/326,038.56
  6. Step 6: Final answer
    x = 173,540.30

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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.