Home / 328,745.12-493,139.75-115,487.10

Finding the Fourth Proportional to 328,745.12, 493,139.75 and 115,487.10

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Solution

The fourth proportional to 328,745.12, 493,139.75 and 115,487.10 is: 173,238.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,745.12 : 493,139.75 = 115,487.10 : x
  2. Step 2: Convert to fraction form
    328,745.12/493,139.75 = 115,487.10/x
  3. Step 3: Cross multiply
    328,745.12x = 493,139.75 × 115,487.10
  4. Step 4: Simplify right side
    328,745.12x = 56,951,279,044.79
  5. Step 5: Solve for x
    x = 56,951,279,044.79/328,745.12
  6. Step 6: Final answer
    x = 173,238.40

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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.