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Finding the Fourth Proportional to 718,297.76, 991,295.58 and 396,007.37

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Solution

The fourth proportional to 718,297.76, 991,295.58 and 396,007.37 is: 546,514.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,297.76 : 991,295.58 = 396,007.37 : x
  2. Step 2: Convert to fraction form
    718,297.76/991,295.58 = 396,007.37/x
  3. Step 3: Cross multiply
    718,297.76x = 991,295.58 × 396,007.37
  4. Step 4: Simplify right side
    718,297.76x = 392,560,355,528.43
  5. Step 5: Solve for x
    x = 392,560,355,528.43/718,297.76
  6. Step 6: Final answer
    x = 546,514.80

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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.