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Finding the Fourth Proportional to 485,411.60, 727,858.20 and 204,611.60

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Solution

The fourth proportional to 485,411.60, 727,858.20 and 204,611.60 is: 306,808.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,411.60 : 727,858.20 = 204,611.60 : x
  2. Step 2: Convert to fraction form
    485,411.60/727,858.20 = 204,611.60/x
  3. Step 3: Cross multiply
    485,411.60x = 727,858.20 × 204,611.60
  4. Step 4: Simplify right side
    485,411.60x = 148,928,230,875.12
  5. Step 5: Solve for x
    x = 148,928,230,875.12/485,411.60
  6. Step 6: Final answer
    x = 306,808.14

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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.