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Finding the Fourth Proportional to 319,430.50, 440,816.13 and 176,194.42

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Solution

The fourth proportional to 319,430.50, 440,816.13 and 176,194.42 is: 243,149.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,430.50 : 440,816.13 = 176,194.42 : x
  2. Step 2: Convert to fraction form
    319,430.50/440,816.13 = 176,194.42/x
  3. Step 3: Cross multiply
    319,430.50x = 440,816.13 × 176,194.42
  4. Step 4: Simplify right side
    319,430.50x = 77,669,342,351.99
  5. Step 5: Solve for x
    x = 77,669,342,351.99/319,430.50
  6. Step 6: Final answer
    x = 243,149.42

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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.