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Finding the Fourth Proportional to 318,015.72, 476,855.82 and 140,438.70

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Solution

The fourth proportional to 318,015.72, 476,855.82 and 140,438.70 is: 210,583.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,015.72 : 476,855.82 = 140,438.70 : x
  2. Step 2: Convert to fraction form
    318,015.72/476,855.82 = 140,438.70/x
  3. Step 3: Cross multiply
    318,015.72x = 476,855.82 × 140,438.70
  4. Step 4: Simplify right side
    318,015.72x = 66,969,011,448.23
  5. Step 5: Solve for x
    x = 66,969,011,448.23/318,015.72
  6. Step 6: Final answer
    x = 210,583.97

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1.5x scale

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.