Home / 1,289,949.42-1,780,150.11-709,197.72

Finding the Fourth Proportional to 1,289,949.42, 1,780,150.11 and 709,197.72

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Solution

The fourth proportional to 1,289,949.42, 1,780,150.11 and 709,197.72 is: 978,703.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,949.42 : 1,780,150.11 = 709,197.72 : x
  2. Step 2: Convert to fraction form
    1,289,949.42/1,780,150.11 = 709,197.72/x
  3. Step 3: Cross multiply
    1,289,949.42x = 1,780,150.11 × 709,197.72
  4. Step 4: Simplify right side
    1,289,949.42x = 1,262,478,399,269.75
  5. Step 5: Solve for x
    x = 1,262,478,399,269.75/1,289,949.42
  6. Step 6: Final answer
    x = 978,703.80

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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.