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Finding the Fourth Proportional to 978,530.80, 1,467,796.20 and 659,666.20

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Solution

The fourth proportional to 978,530.80, 1,467,796.20 and 659,666.20 is: 989,499.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,530.80 : 1,467,796.20 = 659,666.20 : x
  2. Step 2: Convert to fraction form
    978,530.80/1,467,796.20 = 659,666.20/x
  3. Step 3: Cross multiply
    978,530.80x = 1,467,796.20 × 659,666.20
  4. Step 4: Simplify right side
    978,530.80x = 968,255,541,628.44
  5. Step 5: Solve for x
    x = 968,255,541,628.44/978,530.80
  6. Step 6: Final answer
    x = 989,499.30

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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.