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Finding the Fourth Proportional to 818,872.40, 1,228,481.40 and 257,963.60

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Solution

The fourth proportional to 818,872.40, 1,228,481.40 and 257,963.60 is: 386,999.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,872.40 : 1,228,481.40 = 257,963.60 : x
  2. Step 2: Convert to fraction form
    818,872.40/1,228,481.40 = 257,963.60/x
  3. Step 3: Cross multiply
    818,872.40x = 1,228,481.40 × 257,963.60
  4. Step 4: Simplify right side
    818,872.40x = 316,903,484,477.04
  5. Step 5: Solve for x
    x = 316,903,484,477.04/818,872.40
  6. Step 6: Final answer
    x = 386,999.84

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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.