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Finding the Fourth Proportional to 331,346.70, 497,020.05 and 309,039.30

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Solution

The fourth proportional to 331,346.70, 497,020.05 and 309,039.30 is: 463,558.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,346.70 : 497,020.05 = 309,039.30 : x
  2. Step 2: Convert to fraction form
    331,346.70/497,020.05 = 309,039.30/x
  3. Step 3: Cross multiply
    331,346.70x = 497,020.05 × 309,039.30
  4. Step 4: Simplify right side
    331,346.70x = 153,598,728,337.97
  5. Step 5: Solve for x
    x = 153,598,728,337.97/331,346.70
  6. Step 6: Final answer
    x = 463,558.95

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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.