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Finding the Fourth Proportional to 718,940.52, 992,131.26 and 396,653.40

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Solution

The fourth proportional to 718,940.52, 992,131.26 and 396,653.40 is: 547,378.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,940.52 : 992,131.26 = 396,653.40 : x
  2. Step 2: Convert to fraction form
    718,940.52/992,131.26 = 396,653.40/x
  3. Step 3: Cross multiply
    718,940.52x = 992,131.26 × 396,653.40
  4. Step 4: Simplify right side
    718,940.52x = 393,532,237,525.28
  5. Step 5: Solve for x
    x = 393,532,237,525.28/718,940.52
  6. Step 6: Final answer
    x = 547,378.02

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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.