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Finding the Fourth Proportional to 979,761.96, 1,351,978.14 and 549,943.56

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Solution

The fourth proportional to 979,761.96, 1,351,978.14 and 549,943.56 is: 758,869.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,761.96 : 1,351,978.14 = 549,943.56 : x
  2. Step 2: Convert to fraction form
    979,761.96/1,351,978.14 = 549,943.56/x
  3. Step 3: Cross multiply
    979,761.96x = 1,351,978.14 × 549,943.56
  4. Step 4: Simplify right side
    979,761.96x = 743,511,671,353.78
  5. Step 5: Solve for x
    x = 743,511,671,353.78/979,761.96
  6. Step 6: Final answer
    x = 758,869.71

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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.