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Finding the Fourth Proportional to 425,809.14, 637,990.65 and 256,974.69

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Solution

The fourth proportional to 425,809.14, 637,990.65 and 256,974.69 is: 385,025.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,809.14 : 637,990.65 = 256,974.69 : x
  2. Step 2: Convert to fraction form
    425,809.14/637,990.65 = 256,974.69/x
  3. Step 3: Cross multiply
    425,809.14x = 637,990.65 × 256,974.69
  4. Step 4: Simplify right side
    425,809.14x = 163,947,449,506.65
  5. Step 5: Solve for x
    x = 163,947,449,506.65/425,809.14
  6. Step 6: Final answer
    x = 385,025.67

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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.