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Finding the Fourth Proportional to 383,155.83, 528,771.47 and 213,389.96

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Solution

The fourth proportional to 383,155.83, 528,771.47 and 213,389.96 is: 294,487.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,155.83 : 528,771.47 = 213,389.96 : x
  2. Step 2: Convert to fraction form
    383,155.83/528,771.47 = 213,389.96/x
  3. Step 3: Cross multiply
    383,155.83x = 528,771.47 × 213,389.96
  4. Step 4: Simplify right side
    383,155.83x = 112,834,519,121.63
  5. Step 5: Solve for x
    x = 112,834,519,121.63/383,155.83
  6. Step 6: Final answer
    x = 294,487.28

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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.