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Finding the Fourth Proportional to 978,075.20, 1,467,039.90 and 409,309.40

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Solution

The fourth proportional to 978,075.20, 1,467,039.90 and 409,309.40 is: 613,933.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,075.20 : 1,467,039.90 = 409,309.40 : x
  2. Step 2: Convert to fraction form
    978,075.20/1,467,039.90 = 409,309.40/x
  3. Step 3: Cross multiply
    978,075.20x = 1,467,039.90 × 409,309.40
  4. Step 4: Simplify right side
    978,075.20x = 600,473,221,245.06
  5. Step 5: Solve for x
    x = 600,473,221,245.06/978,075.20
  6. Step 6: Final answer
    x = 613,933.59

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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.