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Finding the Fourth Proportional to 319,418.19, 440,781.21 and 176,169.69

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Solution

The fourth proportional to 319,418.19, 440,781.21 and 176,169.69 is: 243,105.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,418.19 : 440,781.21 = 176,169.69 : x
  2. Step 2: Convert to fraction form
    319,418.19/440,781.21 = 176,169.69/x
  3. Step 3: Cross multiply
    319,418.19x = 440,781.21 × 176,169.69
  4. Step 4: Simplify right side
    319,418.19x = 77,652,289,123.52
  5. Step 5: Solve for x
    x = 77,652,289,123.52/319,418.19
  6. Step 6: Final answer
    x = 243,105.41

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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.