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Finding the Fourth Proportional to 1,319,820.86, 1,821,352.84 and 716,208.86

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Solution

The fourth proportional to 1,319,820.86, 1,821,352.84 and 716,208.86 is: 988,368.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,820.86 : 1,821,352.84 = 716,208.86 : x
  2. Step 2: Convert to fraction form
    1,319,820.86/1,821,352.84 = 716,208.86/x
  3. Step 3: Cross multiply
    1,319,820.86x = 1,821,352.84 × 716,208.86
  4. Step 4: Simplify right side
    1,319,820.86x = 1,304,469,041,194.16
  5. Step 5: Solve for x
    x = 1,304,469,041,194.16/1,319,820.86
  6. Step 6: Final answer
    x = 988,368.26

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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.