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Finding the Fourth Proportional to 718,443.28, 991,518.30 and 412,559.80

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Solution

The fourth proportional to 718,443.28, 991,518.30 and 412,559.80 is: 569,370.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,443.28 : 991,518.30 = 412,559.80 : x
  2. Step 2: Convert to fraction form
    718,443.28/991,518.30 = 412,559.80/x
  3. Step 3: Cross multiply
    718,443.28x = 991,518.30 × 412,559.80
  4. Step 4: Simplify right side
    718,443.28x = 409,060,591,544.34
  5. Step 5: Solve for x
    x = 409,060,591,544.34/718,443.28
  6. Step 6: Final answer
    x = 569,370.75

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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.