Home / 985,491.82-1,359,489.81-636,512.23

Finding the Fourth Proportional to 985,491.82, 1,359,489.81 and 636,512.23

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Solution

The fourth proportional to 985,491.82, 1,359,489.81 and 636,512.23 is: 878,071.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,491.82 : 1,359,489.81 = 636,512.23 : x
  2. Step 2: Convert to fraction form
    985,491.82/1,359,489.81 = 636,512.23/x
  3. Step 3: Cross multiply
    985,491.82x = 1,359,489.81 × 636,512.23
  4. Step 4: Simplify right side
    985,491.82x = 865,331,890,625.38
  5. Step 5: Solve for x
    x = 865,331,890,625.38/985,491.82
  6. Step 6: Final answer
    x = 878,071.10

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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.