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Finding the Fourth Proportional to 318,109.00, 438,986.87 and 172,911.64

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Solution

The fourth proportional to 318,109.00, 438,986.87 and 172,911.64 is: 238,616.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,109.00 : 438,986.87 = 172,911.64 : x
  2. Step 2: Convert to fraction form
    318,109.00/438,986.87 = 172,911.64/x
  3. Step 3: Cross multiply
    318,109.00x = 438,986.87 × 172,911.64
  4. Step 4: Simplify right side
    318,109.00x = 75,905,937,668.14
  5. Step 5: Solve for x
    x = 75,905,937,668.14/318,109.00
  6. Step 6: Final answer
    x = 238,616.13

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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.