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Finding the Fourth Proportional to 665,145.60, 997,556.40 and 191,781.60

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Solution

The fourth proportional to 665,145.60, 997,556.40 and 191,781.60 is: 287,625.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,145.60 : 997,556.40 = 191,781.60 : x
  2. Step 2: Convert to fraction form
    665,145.60/997,556.40 = 191,781.60/x
  3. Step 3: Cross multiply
    665,145.60x = 997,556.40 × 191,781.60
  4. Step 4: Simplify right side
    665,145.60x = 191,312,962,482.24
  5. Step 5: Solve for x
    x = 191,312,962,482.24/665,145.60
  6. Step 6: Final answer
    x = 287,625.69

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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.