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Finding the Fourth Proportional to 393,754.80, 591,215.40 and 305,108.40

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Solution

The fourth proportional to 393,754.80, 591,215.40 and 305,108.40 is: 458,114.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,754.80 : 591,215.40 = 305,108.40 : x
  2. Step 2: Convert to fraction form
    393,754.80/591,215.40 = 305,108.40/x
  3. Step 3: Cross multiply
    393,754.80x = 591,215.40 × 305,108.40
  4. Step 4: Simplify right side
    393,754.80x = 180,384,784,749.36
  5. Step 5: Solve for x
    x = 180,384,784,749.36/393,754.80
  6. Step 6: Final answer
    x = 458,114.50

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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.