Home / 499,648.36-689,321.10-318,327.83

Finding the Fourth Proportional to 499,648.36, 689,321.10 and 318,327.83

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Solution

The fourth proportional to 499,648.36, 689,321.10 and 318,327.83 is: 439,169.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,648.36 : 689,321.10 = 318,327.83 : x
  2. Step 2: Convert to fraction form
    499,648.36/689,321.10 = 318,327.83/x
  3. Step 3: Cross multiply
    499,648.36x = 689,321.10 × 318,327.83
  4. Step 4: Simplify right side
    499,648.36x = 219,430,089,936.21
  5. Step 5: Solve for x
    x = 219,430,089,936.21/499,648.36
  6. Step 6: Final answer
    x = 439,169.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.