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Finding the Fourth Proportional to 318,809.94, 439,825.65 and 189,722.54

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Solution

The fourth proportional to 318,809.94, 439,825.65 and 189,722.54 is: 261,738.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,809.94 : 439,825.65 = 189,722.54 : x
  2. Step 2: Convert to fraction form
    318,809.94/439,825.65 = 189,722.54/x
  3. Step 3: Cross multiply
    318,809.94x = 439,825.65 × 189,722.54
  4. Step 4: Simplify right side
    318,809.94x = 83,444,839,475.15
  5. Step 5: Solve for x
    x = 83,444,839,475.15/318,809.94
  6. Step 6: Final answer
    x = 261,738.51

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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.