Home / 427,720.13-641,288.60-216,951.65

Finding the Fourth Proportional to 427,720.13, 641,288.60 and 216,951.65

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Solution

The fourth proportional to 427,720.13, 641,288.60 and 216,951.65 is: 325,279.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,720.13 : 641,288.60 = 216,951.65 : x
  2. Step 2: Convert to fraction form
    427,720.13/641,288.60 = 216,951.65/x
  3. Step 3: Cross multiply
    427,720.13x = 641,288.60 × 216,951.65
  4. Step 4: Simplify right side
    427,720.13x = 139,128,618,811.43
  5. Step 5: Solve for x
    x = 139,128,618,811.43/427,720.13
  6. Step 6: Final answer
    x = 325,279.57

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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.