Home / 811,684.60-1,120,157.76-449,102.56

Finding the Fourth Proportional to 811,684.60, 1,120,157.76 and 449,102.56

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Solution

The fourth proportional to 811,684.60, 1,120,157.76 and 449,102.56 is: 619,779.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,684.60 : 1,120,157.76 = 449,102.56 : x
  2. Step 2: Convert to fraction form
    811,684.60/1,120,157.76 = 449,102.56/x
  3. Step 3: Cross multiply
    811,684.60x = 1,120,157.76 × 449,102.56
  4. Step 4: Simplify right side
    811,684.60x = 503,065,717,619.87
  5. Step 5: Solve for x
    x = 503,065,717,619.87/811,684.60
  6. Step 6: Final answer
    x = 619,779.80

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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.