Home / 491,435.05-678,389.61-330,383.50

Finding the Fourth Proportional to 491,435.05, 678,389.61 and 330,383.50

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Solution

The fourth proportional to 491,435.05, 678,389.61 and 330,383.50 is: 456,069.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,435.05 : 678,389.61 = 330,383.50 : x
  2. Step 2: Convert to fraction form
    491,435.05/678,389.61 = 330,383.50/x
  3. Step 3: Cross multiply
    491,435.05x = 678,389.61 × 330,383.50
  4. Step 4: Simplify right side
    491,435.05x = 224,128,733,715.44
  5. Step 5: Solve for x
    x = 224,128,733,715.44/491,435.05
  6. Step 6: Final answer
    x = 456,069.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.