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Finding the Fourth Proportional to 383,154.57, 528,769.71 and 213,388.70

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Solution

The fourth proportional to 383,154.57, 528,769.71 and 213,388.70 is: 294,485.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,154.57 : 528,769.71 = 213,388.70 : x
  2. Step 2: Convert to fraction form
    383,154.57/528,769.71 = 213,388.70/x
  3. Step 3: Cross multiply
    383,154.57x = 528,769.71 × 213,388.70
  4. Step 4: Simplify right side
    383,154.57x = 112,833,478,372.43
  5. Step 5: Solve for x
    x = 112,833,478,372.43/383,154.57
  6. Step 6: Final answer
    x = 294,485.53

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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.