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Finding the Fourth Proportional to 228,328.70, 315,085.86 and 126,358.47

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Solution

The fourth proportional to 228,328.70, 315,085.86 and 126,358.47 is: 174,370.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,328.70 : 315,085.86 = 126,358.47 : x
  2. Step 2: Convert to fraction form
    228,328.70/315,085.86 = 126,358.47/x
  3. Step 3: Cross multiply
    228,328.70x = 315,085.86 × 126,358.47
  4. Step 4: Simplify right side
    228,328.70x = 39,813,767,188.23
  5. Step 5: Solve for x
    x = 39,813,767,188.23/228,328.70
  6. Step 6: Final answer
    x = 174,370.41

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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.