Home / 381,021.19-571,458.91-191,429.02

Finding the Fourth Proportional to 381,021.19, 571,458.91 and 191,429.02

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Solution

The fourth proportional to 381,021.19, 571,458.91 and 191,429.02 is: 287,106.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,021.19 : 571,458.91 = 191,429.02 : x
  2. Step 2: Convert to fraction form
    381,021.19/571,458.91 = 191,429.02/x
  3. Step 3: Cross multiply
    381,021.19x = 571,458.91 × 191,429.02
  4. Step 4: Simplify right side
    381,021.19x = 109,393,819,111.57
  5. Step 5: Solve for x
    x = 109,393,819,111.57/381,021.19
  6. Step 6: Final answer
    x = 287,106.92

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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.