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Finding the Fourth Proportional to 423,534.32, 635,379.40 and 139,240.88

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Solution

The fourth proportional to 423,534.32, 635,379.40 and 139,240.88 is: 208,886.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,534.32 : 635,379.40 = 139,240.88 : x
  2. Step 2: Convert to fraction form
    423,534.32/635,379.40 = 139,240.88/x
  3. Step 3: Cross multiply
    423,534.32x = 635,379.40 × 139,240.88
  4. Step 4: Simplify right side
    423,534.32x = 88,470,786,789.87
  5. Step 5: Solve for x
    x = 88,470,786,789.87/423,534.32
  6. Step 6: Final answer
    x = 208,886.94

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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.