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Finding the Fourth Proportional to 228,698.88, 315,604.45 and 139,274.88

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Solution

The fourth proportional to 228,698.88, 315,604.45 and 139,274.88 is: 192,199.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,698.88 : 315,604.45 = 139,274.88 : x
  2. Step 2: Convert to fraction form
    228,698.88/315,604.45 = 139,274.88/x
  3. Step 3: Cross multiply
    228,698.88x = 315,604.45 × 139,274.88
  4. Step 4: Simplify right side
    228,698.88x = 43,955,769,975.01
  5. Step 5: Solve for x
    x = 43,955,769,975.01/228,698.88
  6. Step 6: Final answer
    x = 192,199.33

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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.