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Finding the Fourth Proportional to 228,960.72, 315,968.40 and 126,988.20

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Solution

The fourth proportional to 228,960.72, 315,968.40 and 126,988.20 is: 175,245.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,960.72 : 315,968.40 = 126,988.20 : x
  2. Step 2: Convert to fraction form
    228,960.72/315,968.40 = 126,988.20/x
  3. Step 3: Cross multiply
    228,960.72x = 315,968.40 × 126,988.20
  4. Step 4: Simplify right side
    228,960.72x = 40,124,258,372.88
  5. Step 5: Solve for x
    x = 40,124,258,372.88/228,960.72
  6. Step 6: Final answer
    x = 175,245.16

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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.