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Finding the Fourth Proportional to 256,056.80, 384,085.20 and 211,733.60

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Solution

The fourth proportional to 256,056.80, 384,085.20 and 211,733.60 is: 317,600.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,056.80 : 384,085.20 = 211,733.60 : x
  2. Step 2: Convert to fraction form
    256,056.80/384,085.20 = 211,733.60/x
  3. Step 3: Cross multiply
    256,056.80x = 384,085.20 × 211,733.60
  4. Step 4: Simplify right side
    256,056.80x = 81,323,742,102.72
  5. Step 5: Solve for x
    x = 81,323,742,102.72/256,056.80
  6. Step 6: Final answer
    x = 317,600.40

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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.