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Finding the Fourth Proportional to 633,977.42, 874,978.42 and 392,337.80

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Solution

The fourth proportional to 633,977.42, 874,978.42 and 392,337.80 is: 541,481.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,977.42 : 874,978.42 = 392,337.80 : x
  2. Step 2: Convert to fraction form
    633,977.42/874,978.42 = 392,337.80/x
  3. Step 3: Cross multiply
    633,977.42x = 874,978.42 × 392,337.80
  4. Step 4: Simplify right side
    633,977.42x = 343,287,108,350.28
  5. Step 5: Solve for x
    x = 343,287,108,350.28/633,977.42
  6. Step 6: Final answer
    x = 541,481.60

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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.