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Finding the Fourth Proportional to 557,858.22, 769,840.50 and 303,209.40

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Solution

The fourth proportional to 557,858.22, 769,840.50 and 303,209.40 is: 418,426.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,858.22 : 769,840.50 = 303,209.40 : x
  2. Step 2: Convert to fraction form
    557,858.22/769,840.50 = 303,209.40/x
  3. Step 3: Cross multiply
    557,858.22x = 769,840.50 × 303,209.40
  4. Step 4: Simplify right side
    557,858.22x = 233,422,876,100.70
  5. Step 5: Solve for x
    x = 233,422,876,100.70/557,858.22
  6. Step 6: Final answer
    x = 418,426.88

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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.