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Finding the Fourth Proportional to 1,080,760.83, 1,491,631.35 and 731,742.90

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Solution

The fourth proportional to 1,080,760.83, 1,491,631.35 and 731,742.90 is: 1,009,928.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080,760.83 : 1,491,631.35 = 731,742.90 : x
  2. Step 2: Convert to fraction form
    1,080,760.83/1,491,631.35 = 731,742.90/x
  3. Step 3: Cross multiply
    1,080,760.83x = 1,491,631.35 × 731,742.90
  4. Step 4: Simplify right side
    1,080,760.83x = 1,091,490,649,779.92
  5. Step 5: Solve for x
    x = 1,091,490,649,779.92/1,080,760.83
  6. Step 6: Final answer
    x = 1,009,928.02

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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.