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Finding the Fourth Proportional to 643,814.40, 965,851.20 and 223,003.20

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Solution

The fourth proportional to 643,814.40, 965,851.20 and 223,003.20 is: 334,549.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,814.40 : 965,851.20 = 223,003.20 : x
  2. Step 2: Convert to fraction form
    643,814.40/965,851.20 = 223,003.20/x
  3. Step 3: Cross multiply
    643,814.40x = 965,851.20 × 223,003.20
  4. Step 4: Simplify right side
    643,814.40x = 215,387,908,323.84
  5. Step 5: Solve for x
    x = 215,387,908,323.84/643,814.40
  6. Step 6: Final answer
    x = 334,549.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.