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Finding the Fourth Proportional to 865,157.81, 1,194,019.22 and 521,167.40

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Solution

The fourth proportional to 865,157.81, 1,194,019.22 and 521,167.40 is: 719,272.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,157.81 : 1,194,019.22 = 521,167.40 : x
  2. Step 2: Convert to fraction form
    865,157.81/1,194,019.22 = 521,167.40/x
  3. Step 3: Cross multiply
    865,157.81x = 1,194,019.22 × 521,167.40
  4. Step 4: Simplify right side
    865,157.81x = 622,283,887,713.72
  5. Step 5: Solve for x
    x = 622,283,887,713.72/865,157.81
  6. Step 6: Final answer
    x = 719,272.12

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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.