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Finding the Fourth Proportional to 978,940.80, 1,467,244.80 and 410,320.80

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Solution

The fourth proportional to 978,940.80, 1,467,244.80 and 410,320.80 is: 614,992.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,940.80 : 1,467,244.80 = 410,320.80 : x
  2. Step 2: Convert to fraction form
    978,940.80/1,467,244.80 = 410,320.80/x
  3. Step 3: Cross multiply
    978,940.80x = 1,467,244.80 × 410,320.80
  4. Step 4: Simplify right side
    978,940.80x = 602,041,060,131.84
  5. Step 5: Solve for x
    x = 602,041,060,131.84/978,940.80
  6. Step 6: Final answer
    x = 614,992.31

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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.