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Finding the Fourth Proportional to 391,338.40, 540,037.46 and 219,263.56

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Solution

The fourth proportional to 391,338.40, 540,037.46 and 219,263.56 is: 302,578.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,338.40 : 540,037.46 = 219,263.56 : x
  2. Step 2: Convert to fraction form
    391,338.40/540,037.46 = 219,263.56/x
  3. Step 3: Cross multiply
    391,338.40x = 540,037.46 × 219,263.56
  4. Step 4: Simplify right side
    391,338.40x = 118,410,536,012.96
  5. Step 5: Solve for x
    x = 118,410,536,012.96/391,338.40
  6. Step 6: Final answer
    x = 302,578.37

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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.