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Finding the Fourth Proportional to 354,016.28, 488,581.80 and 218,023.40

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Solution

The fourth proportional to 354,016.28, 488,581.80 and 218,023.40 is: 300,896.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,016.28 : 488,581.80 = 218,023.40 : x
  2. Step 2: Convert to fraction form
    354,016.28/488,581.80 = 218,023.40/x
  3. Step 3: Cross multiply
    354,016.28x = 488,581.80 × 218,023.40
  4. Step 4: Simplify right side
    354,016.28x = 106,522,265,214.12
  5. Step 5: Solve for x
    x = 106,522,265,214.12/354,016.28
  6. Step 6: Final answer
    x = 300,896.52

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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.