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Finding the Fourth Proportional to 393,043.80, 542,313.78 and 250,014

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Solution

The fourth proportional to 393,043.80, 542,313.78 and 250,014 is: 344,964.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,043.80 : 542,313.78 = 250,014 : x
  2. Step 2: Convert to fraction form
    393,043.80/542,313.78 = 250,014/x
  3. Step 3: Cross multiply
    393,043.80x = 542,313.78 × 250,014
  4. Step 4: Simplify right side
    393,043.80x = 135,586,037,392.92
  5. Step 5: Solve for x
    x = 135,586,037,392.92/393,043.80
  6. Step 6: Final answer
    x = 344,964.19

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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.