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Finding the Fourth Proportional to 312,679.44, 469,085.40 and 120,558.78

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Solution

The fourth proportional to 312,679.44, 469,085.40 and 120,558.78 is: 180,863.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,679.44 : 469,085.40 = 120,558.78 : x
  2. Step 2: Convert to fraction form
    312,679.44/469,085.40 = 120,558.78/x
  3. Step 3: Cross multiply
    312,679.44x = 469,085.40 × 120,558.78
  4. Step 4: Simplify right side
    312,679.44x = 56,552,363,539.81
  5. Step 5: Solve for x
    x = 56,552,363,539.81/312,679.44
  6. Step 6: Final answer
    x = 180,863.71

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1.5x scale

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.