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Finding the Fourth Proportional to 256,479.60, 384,258.60 and 219,615.60

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Solution

The fourth proportional to 256,479.60, 384,258.60 and 219,615.60 is: 329,028.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,479.60 : 384,258.60 = 219,615.60 : x
  2. Step 2: Convert to fraction form
    256,479.60/384,258.60 = 219,615.60/x
  3. Step 3: Cross multiply
    256,479.60x = 384,258.60 × 219,615.60
  4. Step 4: Simplify right side
    256,479.60x = 84,389,182,994.16
  5. Step 5: Solve for x
    x = 84,389,182,994.16/256,479.60
  6. Step 6: Final answer
    x = 329,028.83

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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.