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Finding the Fourth Proportional to 423,581, 635,236.77 and 139,205.93

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Solution

The fourth proportional to 423,581, 635,236.77 and 139,205.93 is: 208,764.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,581 : 635,236.77 = 139,205.93 : x
  2. Step 2: Convert to fraction form
    423,581/635,236.77 = 139,205.93/x
  3. Step 3: Cross multiply
    423,581x = 635,236.77 × 139,205.93
  4. Step 4: Simplify right side
    423,581x = 88,428,725,338.05
  5. Step 5: Solve for x
    x = 88,428,725,338.05/423,581
  6. Step 6: Final answer
    x = 208,764.62

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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.