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Finding the Fourth Proportional to 628,684.40, 867,603.57 and 445,251.59

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Solution

The fourth proportional to 628,684.40, 867,603.57 and 445,251.59 is: 614,460.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,684.40 : 867,603.57 = 445,251.59 : x
  2. Step 2: Convert to fraction form
    628,684.40/867,603.57 = 445,251.59/x
  3. Step 3: Cross multiply
    628,684.40x = 867,603.57 × 445,251.59
  4. Step 4: Simplify right side
    628,684.40x = 386,301,864,694.16
  5. Step 5: Solve for x
    x = 386,301,864,694.16/628,684.40
  6. Step 6: Final answer
    x = 614,460.72

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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.