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Finding the Fourth Proportional to 313,271.70, 469,907.55 and 218,793.30

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Solution

The fourth proportional to 313,271.70, 469,907.55 and 218,793.30 is: 328,189.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,271.70 : 469,907.55 = 218,793.30 : x
  2. Step 2: Convert to fraction form
    313,271.70/469,907.55 = 218,793.30/x
  3. Step 3: Cross multiply
    313,271.70x = 469,907.55 × 218,793.30
  4. Step 4: Simplify right side
    313,271.70x = 102,812,623,559.42
  5. Step 5: Solve for x
    x = 102,812,623,559.42/313,271.70
  6. Step 6: Final answer
    x = 328,189.95

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1.5x scale

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.