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Finding the Fourth Proportional to 281,390.60, 388,303.60 and 154,041.56

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Solution

The fourth proportional to 281,390.60, 388,303.60 and 154,041.56 is: 212,568.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,390.60 : 388,303.60 = 154,041.56 : x
  2. Step 2: Convert to fraction form
    281,390.60/388,303.60 = 154,041.56/x
  3. Step 3: Cross multiply
    281,390.60x = 388,303.60 × 154,041.56
  4. Step 4: Simplify right side
    281,390.60x = 59,814,892,297.62
  5. Step 5: Solve for x
    x = 59,814,892,297.62/281,390.60
  6. Step 6: Final answer
    x = 212,568.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.