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Finding the Fourth Proportional to 978,064.20, 1,367,631 and 978,064.20

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Solution

The fourth proportional to 978,064.20, 1,367,631 and 978,064.20 is: 1,367,631

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,064.20 : 1,367,631 = 978,064.20 : x
  2. Step 2: Convert to fraction form
    978,064.20/1,367,631 = 978,064.20/x
  3. Step 3: Cross multiply
    978,064.20x = 1,367,631 × 978,064.20
  4. Step 4: Simplify right side
    978,064.20x = 1,337,630,919,910.20
  5. Step 5: Solve for x
    x = 1,337,630,919,910.20/978,064.20
  6. Step 6: Final answer
    x = 1,367,631

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.