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Finding the Fourth Proportional to 666,412.40, 998,063.40 and 653,049.20

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Solution

The fourth proportional to 666,412.40, 998,063.40 and 653,049.20 is: 978,049.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,412.40 : 998,063.40 = 653,049.20 : x
  2. Step 2: Convert to fraction form
    666,412.40/998,063.40 = 653,049.20/x
  3. Step 3: Cross multiply
    666,412.40x = 998,063.40 × 653,049.20
  4. Step 4: Simplify right side
    666,412.40x = 651,784,504,919.28
  5. Step 5: Solve for x
    x = 651,784,504,919.28/666,412.40
  6. Step 6: Final answer
    x = 978,049.79

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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.