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Finding the Fourth Proportional to 339,130.20, 507,917.70 and 331,354.20

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Solution

The fourth proportional to 339,130.20, 507,917.70 and 331,354.20 is: 496,271.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,130.20 : 507,917.70 = 331,354.20 : x
  2. Step 2: Convert to fraction form
    339,130.20/507,917.70 = 331,354.20/x
  3. Step 3: Cross multiply
    339,130.20x = 507,917.70 × 331,354.20
  4. Step 4: Simplify right side
    339,130.20x = 168,300,663,149.34
  5. Step 5: Solve for x
    x = 168,300,663,149.34/339,130.20
  6. Step 6: Final answer
    x = 496,271.53

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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.