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Finding the Fourth Proportional to 550,860.12, 825,514.38 and 438,039.54

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Solution

The fourth proportional to 550,860.12, 825,514.38 and 438,039.54 is: 656,442.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,860.12 : 825,514.38 = 438,039.54 : x
  2. Step 2: Convert to fraction form
    550,860.12/825,514.38 = 438,039.54/x
  3. Step 3: Cross multiply
    550,860.12x = 825,514.38 × 438,039.54
  4. Step 4: Simplify right side
    550,860.12x = 361,607,939,278.59
  5. Step 5: Solve for x
    x = 361,607,939,278.59/550,860.12
  6. Step 6: Final answer
    x = 656,442.40

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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.