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Finding the Fourth Proportional to 281,146.40, 421,719.60 and 255,341.60

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Solution

The fourth proportional to 281,146.40, 421,719.60 and 255,341.60 is: 383,012.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,146.40 : 421,719.60 = 255,341.60 : x
  2. Step 2: Convert to fraction form
    281,146.40/421,719.60 = 255,341.60/x
  3. Step 3: Cross multiply
    281,146.40x = 421,719.60 × 255,341.60
  4. Step 4: Simplify right side
    281,146.40x = 107,682,557,415.36
  5. Step 5: Solve for x
    x = 107,682,557,415.36/281,146.40
  6. Step 6: Final answer
    x = 383,012.40

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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.