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Finding the Fourth Proportional to 978,567.20, 1,467,850.80 and 679,968.80

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Solution

The fourth proportional to 978,567.20, 1,467,850.80 and 679,968.80 is: 1,019,953.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,567.20 : 1,467,850.80 = 679,968.80 : x
  2. Step 2: Convert to fraction form
    978,567.20/1,467,850.80 = 679,968.80/x
  3. Step 3: Cross multiply
    978,567.20x = 1,467,850.80 × 679,968.80
  4. Step 4: Simplify right side
    978,567.20x = 998,092,747,055.04
  5. Step 5: Solve for x
    x = 998,092,747,055.04/978,567.20
  6. Step 6: Final answer
    x = 1,019,953.20

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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.