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Finding the Fourth Proportional to 608,530.80, 839,493.12 and 393,740.88

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Solution

The fourth proportional to 608,530.80, 839,493.12 and 393,740.88 is: 543,181.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,530.80 : 839,493.12 = 393,740.88 : x
  2. Step 2: Convert to fraction form
    608,530.80/839,493.12 = 393,740.88/x
  3. Step 3: Cross multiply
    608,530.80x = 839,493.12 × 393,740.88
  4. Step 4: Simplify right side
    608,530.80x = 330,542,759,822.75
  5. Step 5: Solve for x
    x = 330,542,759,822.75/608,530.80
  6. Step 6: Final answer
    x = 543,181.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.