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Finding the Fourth Proportional to 873,940.56, 1,310,893.84 and 393,903.84

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Solution

The fourth proportional to 873,940.56, 1,310,893.84 and 393,903.84 is: 590,848.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,940.56 : 1,310,893.84 = 393,903.84 : x
  2. Step 2: Convert to fraction form
    873,940.56/1,310,893.84 = 393,903.84/x
  3. Step 3: Cross multiply
    873,940.56x = 1,310,893.84 × 393,903.84
  4. Step 4: Simplify right side
    873,940.56x = 516,366,117,408.35
  5. Step 5: Solve for x
    x = 516,366,117,408.35/873,940.56
  6. Step 6: Final answer
    x = 590,848.10

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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.