Home / 421,450.20-630,620.10-384,125.40

Finding the Fourth Proportional to 421,450.20, 630,620.10 and 384,125.40

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Solution

The fourth proportional to 421,450.20, 630,620.10 and 384,125.40 is: 574,770.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,450.20 : 630,620.10 = 384,125.40 : x
  2. Step 2: Convert to fraction form
    421,450.20/630,620.10 = 384,125.40/x
  3. Step 3: Cross multiply
    421,450.20x = 630,620.10 × 384,125.40
  4. Step 4: Simplify right side
    421,450.20x = 242,237,198,160.54
  5. Step 5: Solve for x
    x = 242,237,198,160.54/421,450.20
  6. Step 6: Final answer
    x = 574,770.63

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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.