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Finding the Fourth Proportional to 651,844.20, 978,203.70 and 385,321.80

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Solution

The fourth proportional to 651,844.20, 978,203.70 and 385,321.80 is: 578,241.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,844.20 : 978,203.70 = 385,321.80 : x
  2. Step 2: Convert to fraction form
    651,844.20/978,203.70 = 385,321.80/x
  3. Step 3: Cross multiply
    651,844.20x = 978,203.70 × 385,321.80
  4. Step 4: Simplify right side
    651,844.20x = 376,923,210,450.66
  5. Step 5: Solve for x
    x = 376,923,210,450.66/651,844.20
  6. Step 6: Final answer
    x = 578,241.26

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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.