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Finding the Fourth Proportional to 638,668.80, 881,421.92 and 366,772.32

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Solution

The fourth proportional to 638,668.80, 881,421.92 and 366,772.32 is: 506,179.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,668.80 : 881,421.92 = 366,772.32 : x
  2. Step 2: Convert to fraction form
    638,668.80/881,421.92 = 366,772.32/x
  3. Step 3: Cross multiply
    638,668.80x = 881,421.92 × 366,772.32
  4. Step 4: Simplify right side
    638,668.80x = 323,281,162,497.25
  5. Step 5: Solve for x
    x = 323,281,162,497.25/638,668.80
  6. Step 6: Final answer
    x = 506,179.67

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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.