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Finding the Fourth Proportional to 633,564.60, 874,319.10 and 378,915.78

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Solution

The fourth proportional to 633,564.60, 874,319.10 and 378,915.78 is: 522,903.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,564.60 : 874,319.10 = 378,915.78 : x
  2. Step 2: Convert to fraction form
    633,564.60/874,319.10 = 378,915.78/x
  3. Step 3: Cross multiply
    633,564.60x = 874,319.10 × 378,915.78
  4. Step 4: Simplify right side
    633,564.60x = 331,293,303,745.40
  5. Step 5: Solve for x
    x = 331,293,303,745.40/633,564.60
  6. Step 6: Final answer
    x = 522,903.75

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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.