Home / 1,120,830.13-1,679,539.70-821,509.21

Finding the Fourth Proportional to 1,120,830.13, 1,679,539.70 and 821,509.21

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Solution

The fourth proportional to 1,120,830.13, 1,679,539.70 and 821,509.21 is: 1,231,013.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,830.13 : 1,679,539.70 = 821,509.21 : x
  2. Step 2: Convert to fraction form
    1,120,830.13/1,679,539.70 = 821,509.21/x
  3. Step 3: Cross multiply
    1,120,830.13x = 1,679,539.70 × 821,509.21
  4. Step 4: Simplify right side
    1,120,830.13x = 1,379,757,328,003.09
  5. Step 5: Solve for x
    x = 1,379,757,328,003.09/1,120,830.13
  6. Step 6: Final answer
    x = 1,231,013.77

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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.