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Finding the Fourth Proportional to 680,879.56, 1,021,387.02 and 260,509

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Solution

The fourth proportional to 680,879.56, 1,021,387.02 and 260,509 is: 390,789.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,879.56 : 1,021,387.02 = 260,509 : x
  2. Step 2: Convert to fraction form
    680,879.56/1,021,387.02 = 260,509/x
  3. Step 3: Cross multiply
    680,879.56x = 1,021,387.02 × 260,509
  4. Step 4: Simplify right side
    680,879.56x = 266,080,511,193.18
  5. Step 5: Solve for x
    x = 266,080,511,193.18/680,879.56
  6. Step 6: Final answer
    x = 390,789.39

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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.