Home / 427,928.62-641,955.53-128,432.89

Finding the Fourth Proportional to 427,928.62, 641,955.53 and 128,432.89

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Solution

The fourth proportional to 427,928.62, 641,955.53 and 128,432.89 is: 192,668.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,928.62 : 641,955.53 = 128,432.89 : x
  2. Step 2: Convert to fraction form
    427,928.62/641,955.53 = 128,432.89/x
  3. Step 3: Cross multiply
    427,928.62x = 641,955.53 × 128,432.89
  4. Step 4: Simplify right side
    427,928.62x = 82,448,204,370.47
  5. Step 5: Solve for x
    x = 82,448,204,370.47/427,928.62
  6. Step 6: Final answer
    x = 192,668.12

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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.