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Finding the Fourth Proportional to 633,960.81, 874,955.61 and 392,321.21

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Solution

The fourth proportional to 633,960.81, 874,955.61 and 392,321.21 is: 541,458.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,960.81 : 874,955.61 = 392,321.21 : x
  2. Step 2: Convert to fraction form
    633,960.81/874,955.61 = 392,321.21/x
  3. Step 3: Cross multiply
    633,960.81x = 874,955.61 × 392,321.21
  4. Step 4: Simplify right side
    633,960.81x = 343,263,639,236.71
  5. Step 5: Solve for x
    x = 343,263,639,236.71/633,960.81
  6. Step 6: Final answer
    x = 541,458.77

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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.