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Finding the Fourth Proportional to 312,586.78, 468,880.15 and 75,927.86

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Solution

The fourth proportional to 312,586.78, 468,880.15 and 75,927.86 is: 113,891.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,586.78 : 468,880.15 = 75,927.86 : x
  2. Step 2: Convert to fraction form
    312,586.78/468,880.15 = 75,927.86/x
  3. Step 3: Cross multiply
    312,586.78x = 468,880.15 × 75,927.86
  4. Step 4: Simplify right side
    312,586.78x = 35,601,066,006.34
  5. Step 5: Solve for x
    x = 35,601,066,006.34/312,586.78
  6. Step 6: Final answer
    x = 113,891.79

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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.