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Finding the Fourth Proportional to 790,816.03, 1,185,978.71 and 285,311.30

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Solution

The fourth proportional to 790,816.03, 1,185,978.71 and 285,311.30 is: 427,878.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,816.03 : 1,185,978.71 = 285,311.30 : x
  2. Step 2: Convert to fraction form
    790,816.03/1,185,978.71 = 285,311.30/x
  3. Step 3: Cross multiply
    790,816.03x = 1,185,978.71 × 285,311.30
  4. Step 4: Simplify right side
    790,816.03x = 338,373,120,165.97
  5. Step 5: Solve for x
    x = 338,373,120,165.97/790,816.03
  6. Step 6: Final answer
    x = 427,878.43

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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.