Home / 718,645.91-991,736.07-396,364.73

Finding the Fourth Proportional to 718,645.91, 991,736.07 and 396,364.73

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Solution

The fourth proportional to 718,645.91, 991,736.07 and 396,364.73 is: 546,985.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,645.91 : 991,736.07 = 396,364.73 : x
  2. Step 2: Convert to fraction form
    718,645.91/991,736.07 = 396,364.73/x
  3. Step 3: Cross multiply
    718,645.91x = 991,736.07 × 396,364.73
  4. Step 4: Simplify right side
    718,645.91x = 393,089,199,616.81
  5. Step 5: Solve for x
    x = 393,089,199,616.81/718,645.91
  6. Step 6: Final answer
    x = 546,985.93

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Double scale
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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.