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Finding the Fourth Proportional to 538,557.89, 807,834.40 and 139,164.71

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Solution

The fourth proportional to 538,557.89, 807,834.40 and 139,164.71 is: 208,746.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,557.89 : 807,834.40 = 139,164.71 : x
  2. Step 2: Convert to fraction form
    538,557.89/807,834.40 = 139,164.71/x
  3. Step 3: Cross multiply
    538,557.89x = 807,834.40 × 139,164.71
  4. Step 4: Simplify right side
    538,557.89x = 112,422,035,616.94
  5. Step 5: Solve for x
    x = 112,422,035,616.94/538,557.89
  6. Step 6: Final answer
    x = 208,746.43

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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.