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Finding the Fourth Proportional to 318,661.48, 439,469.22 and 251,476.84

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Solution

The fourth proportional to 318,661.48, 439,469.22 and 251,476.84 is: 346,814.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,661.48 : 439,469.22 = 251,476.84 : x
  2. Step 2: Convert to fraction form
    318,661.48/439,469.22 = 251,476.84/x
  3. Step 3: Cross multiply
    318,661.48x = 439,469.22 × 251,476.84
  4. Step 4: Simplify right side
    318,661.48x = 110,516,330,722.87
  5. Step 5: Solve for x
    x = 110,516,330,722.87/318,661.48
  6. Step 6: Final answer
    x = 346,814.21

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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.