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Finding the Fourth Proportional to 978,658.40, 1,467,987.60 and 978,658.40

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Solution

The fourth proportional to 978,658.40, 1,467,987.60 and 978,658.40 is: 1,467,987.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,658.40 : 1,467,987.60 = 978,658.40 : x
  2. Step 2: Convert to fraction form
    978,658.40/1,467,987.60 = 978,658.40/x
  3. Step 3: Cross multiply
    978,658.40x = 1,467,987.60 × 978,658.40
  4. Step 4: Simplify right side
    978,658.40x = 1,436,658,395,835.84
  5. Step 5: Solve for x
    x = 1,436,658,395,835.84/978,658.40
  6. Step 6: Final answer
    x = 1,467,987.60

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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.