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Finding the Fourth Proportional to 423,562.37, 635,421.92 and 139,268.57

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Solution

The fourth proportional to 423,562.37, 635,421.92 and 139,268.57 is: 208,928.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,562.37 : 635,421.92 = 139,268.57 : x
  2. Step 2: Convert to fraction form
    423,562.37/635,421.92 = 139,268.57/x
  3. Step 3: Cross multiply
    423,562.37x = 635,421.92 × 139,268.57
  4. Step 4: Simplify right side
    423,562.37x = 88,494,298,271.60
  5. Step 5: Solve for x
    x = 88,494,298,271.60/423,562.37
  6. Step 6: Final answer
    x = 208,928.61

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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.