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Finding the Fourth Proportional to 513,328.20, 769,992.30 and 213,709.20

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Solution

The fourth proportional to 513,328.20, 769,992.30 and 213,709.20 is: 320,563.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,328.20 : 769,992.30 = 213,709.20 : x
  2. Step 2: Convert to fraction form
    513,328.20/769,992.30 = 213,709.20/x
  3. Step 3: Cross multiply
    513,328.20x = 769,992.30 × 213,709.20
  4. Step 4: Simplify right side
    513,328.20x = 164,554,438,439.16
  5. Step 5: Solve for x
    x = 164,554,438,439.16/513,328.20
  6. Step 6: Final answer
    x = 320,563.80

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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.