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Finding the Fourth Proportional to 619,713.28, 855,983.82 and 511,210.80

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Solution

The fourth proportional to 619,713.28, 855,983.82 and 511,210.80 is: 706,113.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,713.28 : 855,983.82 = 511,210.80 : x
  2. Step 2: Convert to fraction form
    619,713.28/855,983.82 = 511,210.80/x
  3. Step 3: Cross multiply
    619,713.28x = 855,983.82 × 511,210.80
  4. Step 4: Simplify right side
    619,713.28x = 437,588,173,409.26
  5. Step 5: Solve for x
    x = 437,588,173,409.26/619,713.28
  6. Step 6: Final answer
    x = 706,113.92

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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.