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Finding the Fourth Proportional to 319,308.90, 440,647.20 and 176,065.80

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Solution

The fourth proportional to 319,308.90, 440,647.20 and 176,065.80 is: 242,971.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,308.90 : 440,647.20 = 176,065.80 : x
  2. Step 2: Convert to fraction form
    319,308.90/440,647.20 = 176,065.80/x
  3. Step 3: Cross multiply
    319,308.90x = 440,647.20 × 176,065.80
  4. Step 4: Simplify right side
    319,308.90x = 77,582,901,785.76
  5. Step 5: Solve for x
    x = 77,582,901,785.76/319,308.90
  6. Step 6: Final answer
    x = 242,971.31

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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.