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Finding the Fourth Proportional to 228,348.72, 315,114.75 and 126,378.45

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Solution

The fourth proportional to 228,348.72, 315,114.75 and 126,378.45 is: 174,398.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,348.72 : 315,114.75 = 126,378.45 : x
  2. Step 2: Convert to fraction form
    228,348.72/315,114.75 = 126,378.45/x
  3. Step 3: Cross multiply
    228,348.72x = 315,114.75 × 126,378.45
  4. Step 4: Simplify right side
    228,348.72x = 39,823,713,677.14
  5. Step 5: Solve for x
    x = 39,823,713,677.14/228,348.72
  6. Step 6: Final answer
    x = 174,398.67

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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.