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Finding the Fourth Proportional to 553,640.67, 764,006.99 and 311,904.27

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Solution

The fourth proportional to 553,640.67, 764,006.99 and 311,904.27 is: 430,418.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,640.67 : 764,006.99 = 311,904.27 : x
  2. Step 2: Convert to fraction form
    553,640.67/764,006.99 = 311,904.27/x
  3. Step 3: Cross multiply
    553,640.67x = 764,006.99 × 311,904.27
  4. Step 4: Simplify right side
    553,640.67x = 238,297,040,931.33
  5. Step 5: Solve for x
    x = 238,297,040,931.33/553,640.67
  6. Step 6: Final answer
    x = 430,418.24

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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.