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Finding the Fourth Proportional to 1,408,983.58, 1,944,401.06 and 764,403.76

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Solution

The fourth proportional to 1,408,983.58, 1,944,401.06 and 764,403.76 is: 1,054,879.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408,983.58 : 1,944,401.06 = 764,403.76 : x
  2. Step 2: Convert to fraction form
    1,408,983.58/1,944,401.06 = 764,403.76/x
  3. Step 3: Cross multiply
    1,408,983.58x = 1,944,401.06 × 764,403.76
  4. Step 4: Simplify right side
    1,408,983.58x = 1,486,307,481,211.99
  5. Step 5: Solve for x
    x = 1,486,307,481,211.99/1,408,983.58
  6. Step 6: Final answer
    x = 1,054,879.21

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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.