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Finding the Fourth Proportional to 311,930.60, 467,895.90 and 279,271.40

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Solution

The fourth proportional to 311,930.60, 467,895.90 and 279,271.40 is: 418,907.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,930.60 : 467,895.90 = 279,271.40 : x
  2. Step 2: Convert to fraction form
    311,930.60/467,895.90 = 279,271.40/x
  3. Step 3: Cross multiply
    311,930.60x = 467,895.90 × 279,271.40
  4. Step 4: Simplify right side
    311,930.60x = 130,669,943,047.26
  5. Step 5: Solve for x
    x = 130,669,943,047.26/311,930.60
  6. Step 6: Final answer
    x = 418,907.10

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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.