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Finding the Fourth Proportional to 281,315.78, 388,181.40 and 224,100.80

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Solution

The fourth proportional to 281,315.78, 388,181.40 and 224,100.80 is: 309,231.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,315.78 : 388,181.40 = 224,100.80 : x
  2. Step 2: Convert to fraction form
    281,315.78/388,181.40 = 224,100.80/x
  3. Step 3: Cross multiply
    281,315.78x = 388,181.40 × 224,100.80
  4. Step 4: Simplify right side
    281,315.78x = 86,991,762,285.12
  5. Step 5: Solve for x
    x = 86,991,762,285.12/281,315.78
  6. Step 6: Final answer
    x = 309,231.72

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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.