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Finding the Fourth Proportional to 318,670.48, 439,481.64 and 251,485.84

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Solution

The fourth proportional to 318,670.48, 439,481.64 and 251,485.84 is: 346,826.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,670.48 : 439,481.64 = 251,485.84 : x
  2. Step 2: Convert to fraction form
    318,670.48/439,481.64 = 251,485.84/x
  3. Step 3: Cross multiply
    318,670.48x = 439,481.64 × 251,485.84
  4. Step 4: Simplify right side
    318,670.48x = 110,523,409,399.98
  5. Step 5: Solve for x
    x = 110,523,409,399.98/318,670.48
  6. Step 6: Final answer
    x = 346,826.63

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1.5x scale

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.