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Finding the Fourth Proportional to 318,405.01, 439,398.75 and 191,080.66

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Solution

The fourth proportional to 318,405.01, 439,398.75 and 191,080.66 is: 263,691.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,405.01 : 439,398.75 = 191,080.66 : x
  2. Step 2: Convert to fraction form
    318,405.01/439,398.75 = 191,080.66/x
  3. Step 3: Cross multiply
    318,405.01x = 439,398.75 × 191,080.66
  4. Step 4: Simplify right side
    318,405.01x = 83,960,603,153.18
  5. Step 5: Solve for x
    x = 83,960,603,153.18/318,405.01
  6. Step 6: Final answer
    x = 263,691.21

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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.