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Finding the Fourth Proportional to 557,860.20, 770,217.81 and 428,568.39

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Solution

The fourth proportional to 557,860.20, 770,217.81 and 428,568.39 is: 591,709.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,860.20 : 770,217.81 = 428,568.39 : x
  2. Step 2: Convert to fraction form
    557,860.20/770,217.81 = 428,568.39/x
  3. Step 3: Cross multiply
    557,860.20x = 770,217.81 × 428,568.39
  4. Step 4: Simplify right side
    557,860.20x = 330,091,006,781.03
  5. Step 5: Solve for x
    x = 330,091,006,781.03/557,860.20
  6. Step 6: Final answer
    x = 591,709.19

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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.