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Finding the Fourth Proportional to 665,087.69, 917,821.11 and 363,281.69

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Solution

The fourth proportional to 665,087.69, 917,821.11 and 363,281.69 is: 501,328.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,087.69 : 917,821.11 = 363,281.69 : x
  2. Step 2: Convert to fraction form
    665,087.69/917,821.11 = 363,281.69/x
  3. Step 3: Cross multiply
    665,087.69x = 917,821.11 × 363,281.69
  4. Step 4: Simplify right side
    665,087.69x = 333,427,603,958.48
  5. Step 5: Solve for x
    x = 333,427,603,958.48/665,087.69
  6. Step 6: Final answer
    x = 501,328.79

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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.