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Finding the Fourth Proportional to 718,293.26, 991,259.70 and 396,016.94

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Solution

The fourth proportional to 718,293.26, 991,259.70 and 396,016.94 is: 546,511.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,293.26 : 991,259.70 = 396,016.94 : x
  2. Step 2: Convert to fraction form
    718,293.26/991,259.70 = 396,016.94/x
  3. Step 3: Cross multiply
    718,293.26x = 991,259.70 × 396,016.94
  4. Step 4: Simplify right side
    718,293.26x = 392,555,633,139.32
  5. Step 5: Solve for x
    x = 392,555,633,139.32/718,293.26
  6. Step 6: Final answer
    x = 546,511.65

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1.5x scale

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.