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Finding the Fourth Proportional to 381,860.80, 572,618.40 and 171,390.40

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Solution

The fourth proportional to 381,860.80, 572,618.40 and 171,390.40 is: 257,008.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,860.80 : 572,618.40 = 171,390.40 : x
  2. Step 2: Convert to fraction form
    381,860.80/572,618.40 = 171,390.40/x
  3. Step 3: Cross multiply
    381,860.80x = 572,618.40 × 171,390.40
  4. Step 4: Simplify right side
    381,860.80x = 98,141,296,623.36
  5. Step 5: Solve for x
    x = 98,141,296,623.36/381,860.80
  6. Step 6: Final answer
    x = 257,008.04

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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.