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Finding the Fourth Proportional to 718,530.72, 1,078,191 and 269,561.76

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Solution

The fourth proportional to 718,530.72, 1,078,191 and 269,561.76 is: 404,490.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,530.72 : 1,078,191 = 269,561.76 : x
  2. Step 2: Convert to fraction form
    718,530.72/1,078,191 = 269,561.76/x
  3. Step 3: Cross multiply
    718,530.72x = 1,078,191 × 269,561.76
  4. Step 4: Simplify right side
    718,530.72x = 290,639,063,576.16
  5. Step 5: Solve for x
    x = 290,639,063,576.16/718,530.72
  6. Step 6: Final answer
    x = 404,490.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.