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Finding the Fourth Proportional to 281,439.69, 388,389.83 and 152,380.85

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Solution

The fourth proportional to 281,439.69, 388,389.83 and 152,380.85 is: 210,287.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,439.69 : 388,389.83 = 152,380.85 : x
  2. Step 2: Convert to fraction form
    281,439.69/388,389.83 = 152,380.85/x
  3. Step 3: Cross multiply
    281,439.69x = 388,389.83 × 152,380.85
  4. Step 4: Simplify right side
    281,439.69x = 59,183,169,722.90
  5. Step 5: Solve for x
    x = 59,183,169,722.90/281,439.69
  6. Step 6: Final answer
    x = 210,287.22

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1.5x scale

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.