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Finding the Fourth Proportional to 318,745.04, 475,785.48 and 280,912.16

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Solution

The fourth proportional to 318,745.04, 475,785.48 and 280,912.16 is: 419,312.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,745.04 : 475,785.48 = 280,912.16 : x
  2. Step 2: Convert to fraction form
    318,745.04/475,785.48 = 280,912.16/x
  3. Step 3: Cross multiply
    318,745.04x = 475,785.48 × 280,912.16
  4. Step 4: Simplify right side
    318,745.04x = 133,653,926,883.44
  5. Step 5: Solve for x
    x = 133,653,926,883.44/318,745.04
  6. Step 6: Final answer
    x = 419,312.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.