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Finding the Fourth Proportional to 281,542.65, 388,533.83 and 154,209.98

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Solution

The fourth proportional to 281,542.65, 388,533.83 and 154,209.98 is: 212,812.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,542.65 : 388,533.83 = 154,209.98 : x
  2. Step 2: Convert to fraction form
    281,542.65/388,533.83 = 154,209.98/x
  3. Step 3: Cross multiply
    281,542.65x = 388,533.83 × 154,209.98
  4. Step 4: Simplify right side
    281,542.65x = 59,915,791,439.90
  5. Step 5: Solve for x
    x = 59,915,791,439.90/281,542.65
  6. Step 6: Final answer
    x = 212,812.49

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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.