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Finding the Fourth Proportional to 358,981.20, 538,909.20 and 181,396.80

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Solution

The fourth proportional to 358,981.20, 538,909.20 and 181,396.80 is: 272,316.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,981.20 : 538,909.20 = 181,396.80 : x
  2. Step 2: Convert to fraction form
    358,981.20/538,909.20 = 181,396.80/x
  3. Step 3: Cross multiply
    358,981.20x = 538,909.20 × 181,396.80
  4. Step 4: Simplify right side
    358,981.20x = 97,756,404,370.56
  5. Step 5: Solve for x
    x = 97,756,404,370.56/358,981.20
  6. Step 6: Final answer
    x = 272,316.22

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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.