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Finding the Fourth Proportional to 321,748.80, 482,623.20 and 298,420.80

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Solution

The fourth proportional to 321,748.80, 482,623.20 and 298,420.80 is: 447,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,748.80 : 482,623.20 = 298,420.80 : x
  2. Step 2: Convert to fraction form
    321,748.80/482,623.20 = 298,420.80/x
  3. Step 3: Cross multiply
    321,748.80x = 482,623.20 × 298,420.80
  4. Step 4: Simplify right side
    321,748.80x = 144,024,801,442.56
  5. Step 5: Solve for x
    x = 144,024,801,442.56/321,748.80
  6. Step 6: Final answer
    x = 447,631.20

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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.