Home / 391,100.04-539,704.35-221,330.52

Finding the Fourth Proportional to 391,100.04, 539,704.35 and 221,330.52

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Solution

The fourth proportional to 391,100.04, 539,704.35 and 221,330.52 is: 305,428.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,100.04 : 539,704.35 = 221,330.52 : x
  2. Step 2: Convert to fraction form
    391,100.04/539,704.35 = 221,330.52/x
  3. Step 3: Cross multiply
    391,100.04x = 539,704.35 × 221,330.52
  4. Step 4: Simplify right side
    391,100.04x = 119,453,044,431.76
  5. Step 5: Solve for x
    x = 119,453,044,431.76/391,100.04
  6. Step 6: Final answer
    x = 305,428.36

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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.