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Finding the Fourth Proportional to 978,415.80, 1,467,623.70 and 891,324.60

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Solution

The fourth proportional to 978,415.80, 1,467,623.70 and 891,324.60 is: 1,336,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,415.80 : 1,467,623.70 = 891,324.60 : x
  2. Step 2: Convert to fraction form
    978,415.80/1,467,623.70 = 891,324.60/x
  3. Step 3: Cross multiply
    978,415.80x = 1,467,623.70 × 891,324.60
  4. Step 4: Simplify right side
    978,415.80x = 1,308,129,107,353.02
  5. Step 5: Solve for x
    x = 1,308,129,107,353.02/978,415.80
  6. Step 6: Final answer
    x = 1,336,986.90

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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.