Home / 391,022.57-539,566.54-218,916.60

Finding the Fourth Proportional to 391,022.57, 539,566.54 and 218,916.60

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Solution

The fourth proportional to 391,022.57, 539,566.54 and 218,916.60 is: 302,079.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,022.57 : 539,566.54 = 218,916.60 : x
  2. Step 2: Convert to fraction form
    391,022.57/539,566.54 = 218,916.60/x
  3. Step 3: Cross multiply
    391,022.57x = 539,566.54 × 218,916.60
  4. Step 4: Simplify right side
    391,022.57x = 118,120,071,863.27
  5. Step 5: Solve for x
    x = 118,120,071,863.27/391,022.57
  6. Step 6: Final answer
    x = 302,079.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.