Home / 921,999.78-1,382,210.82-353,788.64

Finding the Fourth Proportional to 921,999.78, 1,382,210.82 and 353,788.64

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Solution

The fourth proportional to 921,999.78, 1,382,210.82 and 353,788.64 is: 530,380.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,999.78 : 1,382,210.82 = 353,788.64 : x
  2. Step 2: Convert to fraction form
    921,999.78/1,382,210.82 = 353,788.64/x
  3. Step 3: Cross multiply
    921,999.78x = 1,382,210.82 × 353,788.64
  4. Step 4: Simplify right side
    921,999.78x = 489,010,486,201.09
  5. Step 5: Solve for x
    x = 489,010,486,201.09/921,999.78
  6. Step 6: Final answer
    x = 530,380.26

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1.5x scale

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.