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Finding the Fourth Proportional to 426,234.80, 639,697.80 and 412,410.80

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Solution

The fourth proportional to 426,234.80, 639,697.80 and 412,410.80 is: 618,950.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,234.80 : 639,697.80 = 412,410.80 : x
  2. Step 2: Convert to fraction form
    426,234.80/639,697.80 = 412,410.80/x
  3. Step 3: Cross multiply
    426,234.80x = 639,697.80 × 412,410.80
  4. Step 4: Simplify right side
    426,234.80x = 263,818,281,456.24
  5. Step 5: Solve for x
    x = 263,818,281,456.24/426,234.80
  6. Step 6: Final answer
    x = 618,950.59

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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.