Home / 521,811.40-719,781.45-345,001.21

Finding the Fourth Proportional to 521,811.40, 719,781.45 and 345,001.21

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Solution

The fourth proportional to 521,811.40, 719,781.45 and 345,001.21 is: 475,891.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,811.40 : 719,781.45 = 345,001.21 : x
  2. Step 2: Convert to fraction form
    521,811.40/719,781.45 = 345,001.21/x
  3. Step 3: Cross multiply
    521,811.40x = 719,781.45 × 345,001.21
  4. Step 4: Simplify right side
    521,811.40x = 248,325,471,185.56
  5. Step 5: Solve for x
    x = 248,325,471,185.56/521,811.40
  6. Step 6: Final answer
    x = 475,891.23

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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.