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Finding the Fourth Proportional to 386,736.40, 580,104.60 and 220,848.40

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Solution

The fourth proportional to 386,736.40, 580,104.60 and 220,848.40 is: 331,272.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,736.40 : 580,104.60 = 220,848.40 : x
  2. Step 2: Convert to fraction form
    386,736.40/580,104.60 = 220,848.40/x
  3. Step 3: Cross multiply
    386,736.40x = 580,104.60 × 220,848.40
  4. Step 4: Simplify right side
    386,736.40x = 128,115,172,742.64
  5. Step 5: Solve for x
    x = 128,115,172,742.64/386,736.40
  6. Step 6: Final answer
    x = 331,272.60

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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.