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Finding the Fourth Proportional to 312,369.88, 468,554.80 and 75,712.56

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Solution

The fourth proportional to 312,369.88, 468,554.80 and 75,712.56 is: 113,568.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,369.88 : 468,554.80 = 75,712.56 : x
  2. Step 2: Convert to fraction form
    312,369.88/468,554.80 = 75,712.56/x
  3. Step 3: Cross multiply
    312,369.88x = 468,554.80 × 75,712.56
  4. Step 4: Simplify right side
    312,369.88x = 35,475,483,408.29
  5. Step 5: Solve for x
    x = 35,475,483,408.29/312,369.88
  6. Step 6: Final answer
    x = 113,568.84

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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.