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Finding the Fourth Proportional to 978,443.20, 1,467,664.80 and 843,140.80

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Solution

The fourth proportional to 978,443.20, 1,467,664.80 and 843,140.80 is: 1,264,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,443.20 : 1,467,664.80 = 843,140.80 : x
  2. Step 2: Convert to fraction form
    978,443.20/1,467,664.80 = 843,140.80/x
  3. Step 3: Cross multiply
    978,443.20x = 1,467,664.80 × 843,140.80
  4. Step 4: Simplify right side
    978,443.20x = 1,237,448,073,603.84
  5. Step 5: Solve for x
    x = 1,237,448,073,603.84/978,443.20
  6. Step 6: Final answer
    x = 1,264,711.20

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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.