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Finding the Fourth Proportional to 318,571.71, 439,620.63 and 173,380.40

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Solution

The fourth proportional to 318,571.71, 439,620.63 and 173,380.40 is: 239,260.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,571.71 : 439,620.63 = 173,380.40 : x
  2. Step 2: Convert to fraction form
    318,571.71/439,620.63 = 173,380.40/x
  3. Step 3: Cross multiply
    318,571.71x = 439,620.63 × 173,380.40
  4. Step 4: Simplify right side
    318,571.71x = 76,221,598,479.55
  5. Step 5: Solve for x
    x = 76,221,598,479.55/318,571.71
  6. Step 6: Final answer
    x = 239,260.41

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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.