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Finding the Fourth Proportional to 1,292,759.86, 1,939,509.77 and 440,019.40

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Solution

The fourth proportional to 1,292,759.86, 1,939,509.77 and 440,019.40 is: 660,155.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292,759.86 : 1,939,509.77 = 440,019.40 : x
  2. Step 2: Convert to fraction form
    1,292,759.86/1,939,509.77 = 440,019.40/x
  3. Step 3: Cross multiply
    1,292,759.86x = 1,939,509.77 × 440,019.40
  4. Step 4: Simplify right side
    1,292,759.86x = 853,421,925,289.54
  5. Step 5: Solve for x
    x = 853,421,925,289.54/1,292,759.86
  6. Step 6: Final answer
    x = 660,155.03

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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.