Home / 509,932.20-764,898.30-421,285.80

Finding the Fourth Proportional to 509,932.20, 764,898.30 and 421,285.80

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Solution

The fourth proportional to 509,932.20, 764,898.30 and 421,285.80 is: 631,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,932.20 : 764,898.30 = 421,285.80 : x
  2. Step 2: Convert to fraction form
    509,932.20/764,898.30 = 421,285.80/x
  3. Step 3: Cross multiply
    509,932.20x = 764,898.30 × 421,285.80
  4. Step 4: Simplify right side
    509,932.20x = 322,240,792,234.14
  5. Step 5: Solve for x
    x = 322,240,792,234.14/509,932.20
  6. Step 6: Final answer
    x = 631,928.70

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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.