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Finding the Fourth Proportional to 228,624.05, 315,512.35 and 137,978.37

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Solution

The fourth proportional to 228,624.05, 315,512.35 and 137,978.37 is: 190,416.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,624.05 : 315,512.35 = 137,978.37 : x
  2. Step 2: Convert to fraction form
    228,624.05/315,512.35 = 137,978.37/x
  3. Step 3: Cross multiply
    228,624.05x = 315,512.35 × 137,978.37
  4. Step 4: Simplify right side
    228,624.05x = 43,533,879,422.92
  5. Step 5: Solve for x
    x = 43,533,879,422.92/228,624.05
  6. Step 6: Final answer
    x = 190,416.88

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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.