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Finding the Fourth Proportional to 978,406.80, 1,467,610.20 and 347,384.40

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Solution

The fourth proportional to 978,406.80, 1,467,610.20 and 347,384.40 is: 521,076.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,406.80 : 1,467,610.20 = 347,384.40 : x
  2. Step 2: Convert to fraction form
    978,406.80/1,467,610.20 = 347,384.40/x
  3. Step 3: Cross multiply
    978,406.80x = 1,467,610.20 × 347,384.40
  4. Step 4: Simplify right side
    978,406.80x = 509,824,888,760.88
  5. Step 5: Solve for x
    x = 509,824,888,760.88/978,406.80
  6. Step 6: Final answer
    x = 521,076.60

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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.