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Finding the Fourth Proportional to 608,615.16, 839,605.92 and 393,824.64

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Solution

The fourth proportional to 608,615.16, 839,605.92 and 393,824.64 is: 543,294.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,615.16 : 839,605.92 = 393,824.64 : x
  2. Step 2: Convert to fraction form
    608,615.16/839,605.92 = 393,824.64/x
  3. Step 3: Cross multiply
    608,615.16x = 839,605.92 × 393,824.64
  4. Step 4: Simplify right side
    608,615.16x = 330,657,499,185.87
  5. Step 5: Solve for x
    x = 330,657,499,185.87/608,615.16
  6. Step 6: Final answer
    x = 543,294.88

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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.