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Finding the Fourth Proportional to 253,313.70, 379,970.55 and 103,455.60

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Solution

The fourth proportional to 253,313.70, 379,970.55 and 103,455.60 is: 155,183.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,313.70 : 379,970.55 = 103,455.60 : x
  2. Step 2: Convert to fraction form
    253,313.70/379,970.55 = 103,455.60/x
  3. Step 3: Cross multiply
    253,313.70x = 379,970.55 × 103,455.60
  4. Step 4: Simplify right side
    253,313.70x = 39,310,081,232.58
  5. Step 5: Solve for x
    x = 39,310,081,232.58/253,313.70
  6. Step 6: Final answer
    x = 155,183.40

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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.