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Finding the Fourth Proportional to 643,810.40, 965,710.80 and 194,530.40

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Solution

The fourth proportional to 643,810.40, 965,710.80 and 194,530.40 is: 291,794.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,810.40 : 965,710.80 = 194,530.40 : x
  2. Step 2: Convert to fraction form
    643,810.40/965,710.80 = 194,530.40/x
  3. Step 3: Cross multiply
    643,810.40x = 965,710.80 × 194,530.40
  4. Step 4: Simplify right side
    643,810.40x = 187,860,108,208.32
  5. Step 5: Solve for x
    x = 187,860,108,208.32/643,810.40
  6. Step 6: Final answer
    x = 291,794.15

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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.