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Finding the Fourth Proportional to 718,305.64, 991,320.86 and 396,046.33

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Solution

The fourth proportional to 718,305.64, 991,320.86 and 396,046.33 is: 546,576.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,305.64 : 991,320.86 = 396,046.33 : x
  2. Step 2: Convert to fraction form
    718,305.64/991,320.86 = 396,046.33/x
  3. Step 3: Cross multiply
    718,305.64x = 991,320.86 × 396,046.33
  4. Step 4: Simplify right side
    718,305.64x = 392,608,986,967.26
  5. Step 5: Solve for x
    x = 392,608,986,967.26/718,305.64
  6. Step 6: Final answer
    x = 546,576.51

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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.