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Finding the Fourth Proportional to 538,981.20, 808,474.20 and 139,593.60

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Solution

The fourth proportional to 538,981.20, 808,474.20 and 139,593.60 is: 209,391.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,981.20 : 808,474.20 = 139,593.60 : x
  2. Step 2: Convert to fraction form
    538,981.20/808,474.20 = 139,593.60/x
  3. Step 3: Cross multiply
    538,981.20x = 808,474.20 × 139,593.60
  4. Step 4: Simplify right side
    538,981.20x = 112,857,824,085.12
  5. Step 5: Solve for x
    x = 112,857,824,085.12/538,981.20
  6. Step 6: Final answer
    x = 209,391.02

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Similar ratio
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1.5x scale

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.