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Finding the Fourth Proportional to 538,981.80, 809,128.80 and 272,605.20

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Solution

The fourth proportional to 538,981.80, 809,128.80 and 272,605.20 is: 409,239.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,981.80 : 809,128.80 = 272,605.20 : x
  2. Step 2: Convert to fraction form
    538,981.80/809,128.80 = 272,605.20/x
  3. Step 3: Cross multiply
    538,981.80x = 809,128.80 × 272,605.20
  4. Step 4: Simplify right side
    538,981.80x = 220,572,718,349.76
  5. Step 5: Solve for x
    x = 220,572,718,349.76/538,981.80
  6. Step 6: Final answer
    x = 409,239.64

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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.