Home / 853,705.21-1,280,382.85-313,775.41

Finding the Fourth Proportional to 853,705.21, 1,280,382.85 and 313,775.41

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Solution

The fourth proportional to 853,705.21, 1,280,382.85 and 313,775.41 is: 470,598.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,705.21 : 1,280,382.85 = 313,775.41 : x
  2. Step 2: Convert to fraction form
    853,705.21/1,280,382.85 = 313,775.41/x
  3. Step 3: Cross multiply
    853,705.21x = 1,280,382.85 × 313,775.41
  4. Step 4: Simplify right side
    853,705.21x = 401,752,653,715.72
  5. Step 5: Solve for x
    x = 401,752,653,715.72/853,705.21
  6. Step 6: Final answer
    x = 470,598.81

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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.