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Finding the Fourth Proportional to 351,588.70, 528,879.66 and 318,705.31

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Solution

The fourth proportional to 351,588.70, 528,879.66 and 318,705.31 is: 479,414.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,588.70 : 528,879.66 = 318,705.31 : x
  2. Step 2: Convert to fraction form
    351,588.70/528,879.66 = 318,705.31/x
  3. Step 3: Cross multiply
    351,588.70x = 528,879.66 × 318,705.31
  4. Step 4: Simplify right side
    351,588.70x = 168,556,755,993.00
  5. Step 5: Solve for x
    x = 168,556,755,993.00/351,588.70
  6. Step 6: Final answer
    x = 479,414.60

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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.