Home / 1,209,509.40-1,669,234.83-665,755.59

Finding the Fourth Proportional to 1,209,509.40, 1,669,234.83 and 665,755.59

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Solution

The fourth proportional to 1,209,509.40, 1,669,234.83 and 665,755.59 is: 918,804.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,509.40 : 1,669,234.83 = 665,755.59 : x
  2. Step 2: Convert to fraction form
    1,209,509.40/1,669,234.83 = 665,755.59/x
  3. Step 3: Cross multiply
    1,209,509.40x = 1,669,234.83 × 665,755.59
  4. Step 4: Simplify right side
    1,209,509.40x = 1,111,302,419,095.20
  5. Step 5: Solve for x
    x = 1,111,302,419,095.20/1,209,509.40
  6. Step 6: Final answer
    x = 918,804.28

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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.