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Finding the Fourth Proportional to 257,419.60, 386,129.40 and 146,827.60

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Solution

The fourth proportional to 257,419.60, 386,129.40 and 146,827.60 is: 220,241.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,419.60 : 386,129.40 = 146,827.60 : x
  2. Step 2: Convert to fraction form
    257,419.60/386,129.40 = 146,827.60/x
  3. Step 3: Cross multiply
    257,419.60x = 386,129.40 × 146,827.60
  4. Step 4: Simplify right side
    257,419.60x = 56,694,453,091.44
  5. Step 5: Solve for x
    x = 56,694,453,091.44/257,419.60
  6. Step 6: Final answer
    x = 220,241.40

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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.