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Finding the Fourth Proportional to 383,122.89, 528,671.75 and 213,372.81

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Solution

The fourth proportional to 383,122.89, 528,671.75 and 213,372.81 is: 294,433.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,122.89 : 528,671.75 = 213,372.81 : x
  2. Step 2: Convert to fraction form
    383,122.89/528,671.75 = 213,372.81/x
  3. Step 3: Cross multiply
    383,122.89x = 528,671.75 × 213,372.81
  4. Step 4: Simplify right side
    383,122.89x = 112,804,175,798.25
  5. Step 5: Solve for x
    x = 112,804,175,798.25/383,122.89
  6. Step 6: Final answer
    x = 294,433.40

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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.