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Finding the Fourth Proportional to 708,996.44, 978,426.76 and 386,706.56

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Solution

The fourth proportional to 708,996.44, 978,426.76 and 386,706.56 is: 533,661.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,996.44 : 978,426.76 = 386,706.56 : x
  2. Step 2: Convert to fraction form
    708,996.44/978,426.76 = 386,706.56/x
  3. Step 3: Cross multiply
    708,996.44x = 978,426.76 × 386,706.56
  4. Step 4: Simplify right side
    708,996.44x = 378,364,046,571.55
  5. Step 5: Solve for x
    x = 378,364,046,571.55/708,996.44
  6. Step 6: Final answer
    x = 533,661.42

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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.