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Finding the Fourth Proportional to 665,405.31, 998,393.91 and 216,263.82

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Solution

The fourth proportional to 665,405.31, 998,393.91 and 216,263.82 is: 324,488.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,405.31 : 998,393.91 = 216,263.82 : x
  2. Step 2: Convert to fraction form
    665,405.31/998,393.91 = 216,263.82/x
  3. Step 3: Cross multiply
    665,405.31x = 998,393.91 × 216,263.82
  4. Step 4: Simplify right side
    665,405.31x = 215,916,480,841.34
  5. Step 5: Solve for x
    x = 215,916,480,841.34/665,405.31
  6. Step 6: Final answer
    x = 324,488.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.