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Finding the Fourth Proportional to 429,879.40, 643,288.20 and 374,329.60

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Solution

The fourth proportional to 429,879.40, 643,288.20 and 374,329.60 is: 560,161.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,879.40 : 643,288.20 = 374,329.60 : x
  2. Step 2: Convert to fraction form
    429,879.40/643,288.20 = 374,329.60/x
  3. Step 3: Cross multiply
    429,879.40x = 643,288.20 × 374,329.60
  4. Step 4: Simplify right side
    429,879.40x = 240,801,814,590.72
  5. Step 5: Solve for x
    x = 240,801,814,590.72/429,879.40
  6. Step 6: Final answer
    x = 560,161.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.