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Finding the Fourth Proportional to 381,390.21, 526,514.49 and 268,715.97

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Solution

The fourth proportional to 381,390.21, 526,514.49 and 268,715.97 is: 370,966.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,390.21 : 526,514.49 = 268,715.97 : x
  2. Step 2: Convert to fraction form
    381,390.21/526,514.49 = 268,715.97/x
  3. Step 3: Cross multiply
    381,390.21x = 526,514.49 × 268,715.97
  4. Step 4: Simplify right side
    381,390.21x = 141,482,851,899.41
  5. Step 5: Solve for x
    x = 141,482,851,899.41/381,390.21
  6. Step 6: Final answer
    x = 370,966.13

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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.