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Finding the Fourth Proportional to 328,820.70, 493,231.05 and 142,196.70

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Solution

The fourth proportional to 328,820.70, 493,231.05 and 142,196.70 is: 213,295.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,820.70 : 493,231.05 = 142,196.70 : x
  2. Step 2: Convert to fraction form
    328,820.70/493,231.05 = 142,196.70/x
  3. Step 3: Cross multiply
    328,820.70x = 493,231.05 × 142,196.70
  4. Step 4: Simplify right side
    328,820.70x = 70,135,827,647.54
  5. Step 5: Solve for x
    x = 70,135,827,647.54/328,820.70
  6. Step 6: Final answer
    x = 213,295.05

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1.5x scale

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.