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Finding the Fourth Proportional to 644,761.00, 889,779.41 and 354,399.42

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Solution

The fourth proportional to 644,761.00, 889,779.41 and 354,399.42 is: 489,076.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,761.00 : 889,779.41 = 354,399.42 : x
  2. Step 2: Convert to fraction form
    644,761.00/889,779.41 = 354,399.42/x
  3. Step 3: Cross multiply
    644,761.00x = 889,779.41 × 354,399.42
  4. Step 4: Simplify right side
    644,761.00x = 315,337,307,843.42
  5. Step 5: Solve for x
    x = 315,337,307,843.42/644,761.00
  6. Step 6: Final answer
    x = 489,076.27

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1.5x scale

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.