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Finding the Fourth Proportional to 228,766.45, 343,313.70 and 128,820.55

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Solution

The fourth proportional to 228,766.45, 343,313.70 and 128,820.55 is: 193,323.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,766.45 : 343,313.70 = 128,820.55 : x
  2. Step 2: Convert to fraction form
    228,766.45/343,313.70 = 128,820.55/x
  3. Step 3: Cross multiply
    228,766.45x = 343,313.70 × 128,820.55
  4. Step 4: Simplify right side
    228,766.45x = 44,225,859,656.54
  5. Step 5: Solve for x
    x = 44,225,859,656.54/228,766.45
  6. Step 6: Final answer
    x = 193,323.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.