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Finding the Fourth Proportional to 718,804.73, 991,950.60 and 396,515.66

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Solution

The fourth proportional to 718,804.73, 991,950.60 and 396,515.66 is: 547,191.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,804.73 : 991,950.60 = 396,515.66 : x
  2. Step 2: Convert to fraction form
    718,804.73/991,950.60 = 396,515.66/x
  3. Step 3: Cross multiply
    718,804.73x = 991,950.60 × 396,515.66
  4. Step 4: Simplify right side
    718,804.73x = 393,323,943,373.58
  5. Step 5: Solve for x
    x = 393,323,943,373.58/718,804.73
  6. Step 6: Final answer
    x = 547,191.64

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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.