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Finding the Fourth Proportional to 513,778.50, 770,889.20 and 214,318.06

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Solution

The fourth proportional to 513,778.50, 770,889.20 and 214,318.06 is: 321,569.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,778.50 : 770,889.20 = 214,318.06 : x
  2. Step 2: Convert to fraction form
    513,778.50/770,889.20 = 214,318.06/x
  3. Step 3: Cross multiply
    513,778.50x = 770,889.20 × 214,318.06
  4. Step 4: Simplify right side
    513,778.50x = 165,215,477,818.95
  5. Step 5: Solve for x
    x = 165,215,477,818.95/513,778.50
  6. Step 6: Final answer
    x = 321,569.47

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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.