Home / 427,929.12-641,956.28-128,433.39

Finding the Fourth Proportional to 427,929.12, 641,956.28 and 128,433.39

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Solution

The fourth proportional to 427,929.12, 641,956.28 and 128,433.39 is: 192,668.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,929.12 : 641,956.28 = 128,433.39 : x
  2. Step 2: Convert to fraction form
    427,929.12/641,956.28 = 128,433.39/x
  3. Step 3: Cross multiply
    427,929.12x = 641,956.28 × 128,433.39
  4. Step 4: Simplify right side
    427,929.12x = 82,448,620,630.02
  5. Step 5: Solve for x
    x = 82,448,620,630.02/427,929.12
  6. Step 6: Final answer
    x = 192,668.87

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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.