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Finding the Fourth Proportional to 228,390.54, 315,170.88 and 126,416.20

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Solution

The fourth proportional to 228,390.54, 315,170.88 and 126,416.20 is: 174,449.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,390.54 : 315,170.88 = 126,416.20 : x
  2. Step 2: Convert to fraction form
    228,390.54/315,170.88 = 126,416.20/x
  3. Step 3: Cross multiply
    228,390.54x = 315,170.88 × 126,416.20
  4. Step 4: Simplify right side
    228,390.54x = 39,842,705,000.26
  5. Step 5: Solve for x
    x = 39,842,705,000.26/228,390.54
  6. Step 6: Final answer
    x = 174,449.89

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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.