Home / 427,934.27-641,963.99-128,438.53

Finding the Fourth Proportional to 427,934.27, 641,963.99 and 128,438.53

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Solution

The fourth proportional to 427,934.27, 641,963.99 and 128,438.53 is: 192,676.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,934.27 : 641,963.99 = 128,438.53 : x
  2. Step 2: Convert to fraction form
    427,934.27/641,963.99 = 128,438.53/x
  3. Step 3: Cross multiply
    427,934.27x = 641,963.99 × 128,438.53
  4. Step 4: Simplify right side
    427,934.27x = 82,452,909,904.72
  5. Step 5: Solve for x
    x = 82,452,909,904.72/427,934.27
  6. Step 6: Final answer
    x = 192,676.57

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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.