Home / 643,256.40-964,078.20-327,838.80

Finding the Fourth Proportional to 643,256.40, 964,078.20 and 327,838.80

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Solution

The fourth proportional to 643,256.40, 964,078.20 and 327,838.80 is: 491,347.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,256.40 : 964,078.20 = 327,838.80 : x
  2. Step 2: Convert to fraction form
    643,256.40/964,078.20 = 327,838.80/x
  3. Step 3: Cross multiply
    643,256.40x = 964,078.20 × 327,838.80
  4. Step 4: Simplify right side
    643,256.40x = 316,062,240,194.16
  5. Step 5: Solve for x
    x = 316,062,240,194.16/643,256.40
  6. Step 6: Final answer
    x = 491,347.21

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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.