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Finding the Fourth Proportional to 228,589.54, 315,607.70 and 142,679.41

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Solution

The fourth proportional to 228,589.54, 315,607.70 and 142,679.41 is: 196,993.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,589.54 : 315,607.70 = 142,679.41 : x
  2. Step 2: Convert to fraction form
    228,589.54/315,607.70 = 142,679.41/x
  3. Step 3: Cross multiply
    228,589.54x = 315,607.70 × 142,679.41
  4. Step 4: Simplify right side
    228,589.54x = 45,030,719,995.14
  5. Step 5: Solve for x
    x = 45,030,719,995.14/228,589.54
  6. Step 6: Final answer
    x = 196,993.79

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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.