Home / 427,983.42-641,973.56-128,462.70

Finding the Fourth Proportional to 427,983.42, 641,973.56 and 128,462.70

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Solution

The fourth proportional to 427,983.42, 641,973.56 and 128,462.70 is: 192,693.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,983.42 : 641,973.56 = 128,462.70 : x
  2. Step 2: Convert to fraction form
    427,983.42/641,973.56 = 128,462.70/x
  3. Step 3: Cross multiply
    427,983.42x = 641,973.56 × 128,462.70
  4. Step 4: Simplify right side
    427,983.42x = 82,469,656,846.21
  5. Step 5: Solve for x
    x = 82,469,656,846.21/427,983.42
  6. Step 6: Final answer
    x = 192,693.58

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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.