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Finding the Fourth Proportional to 538,856.06, 808,218.48 and 139,463.70

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Solution

The fourth proportional to 538,856.06, 808,218.48 and 139,463.70 is: 209,178.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,856.06 : 808,218.48 = 139,463.70 : x
  2. Step 2: Convert to fraction form
    538,856.06/808,218.48 = 139,463.70/x
  3. Step 3: Cross multiply
    538,856.06x = 808,218.48 × 139,463.70
  4. Step 4: Simplify right side
    538,856.06x = 112,717,139,629.18
  5. Step 5: Solve for x
    x = 112,717,139,629.18/538,856.06
  6. Step 6: Final answer
    x = 209,178.57

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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.