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Finding the Fourth Proportional to 978,412.80, 1,467,619.20 and 446,971.80

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Solution

The fourth proportional to 978,412.80, 1,467,619.20 and 446,971.80 is: 670,457.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,412.80 : 1,467,619.20 = 446,971.80 : x
  2. Step 2: Convert to fraction form
    978,412.80/1,467,619.20 = 446,971.80/x
  3. Step 3: Cross multiply
    978,412.80x = 1,467,619.20 × 446,971.80
  4. Step 4: Simplify right side
    978,412.80x = 655,984,395,538.56
  5. Step 5: Solve for x
    x = 655,984,395,538.56/978,412.80
  6. Step 6: Final answer
    x = 670,457.70

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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.