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Finding the Fourth Proportional to 985,936.80, 1,478,905.20 and 782,983.20

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Solution

The fourth proportional to 985,936.80, 1,478,905.20 and 782,983.20 is: 1,174,474.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,936.80 : 1,478,905.20 = 782,983.20 : x
  2. Step 2: Convert to fraction form
    985,936.80/1,478,905.20 = 782,983.20/x
  3. Step 3: Cross multiply
    985,936.80x = 1,478,905.20 × 782,983.20
  4. Step 4: Simplify right side
    985,936.80x = 1,157,957,925,992.64
  5. Step 5: Solve for x
    x = 1,157,957,925,992.64/985,936.80
  6. Step 6: Final answer
    x = 1,174,474.80

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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.