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Finding the Fourth Proportional to 485,090.40, 727,981.20 and 204,808.80

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Solution

The fourth proportional to 485,090.40, 727,981.20 and 204,808.80 is: 307,359.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,090.40 : 727,981.20 = 204,808.80 : x
  2. Step 2: Convert to fraction form
    485,090.40/727,981.20 = 204,808.80/x
  3. Step 3: Cross multiply
    485,090.40x = 727,981.20 × 204,808.80
  4. Step 4: Simplify right side
    485,090.40x = 149,096,955,994.56
  5. Step 5: Solve for x
    x = 149,096,955,994.56/485,090.40
  6. Step 6: Final answer
    x = 307,359.11

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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.