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Finding the Fourth Proportional to 286,512.60, 429,485.40 and 126,675.30

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Solution

The fourth proportional to 286,512.60, 429,485.40 and 126,675.30 is: 189,887.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,512.60 : 429,485.40 = 126,675.30 : x
  2. Step 2: Convert to fraction form
    286,512.60/429,485.40 = 126,675.30/x
  3. Step 3: Cross multiply
    286,512.60x = 429,485.40 × 126,675.30
  4. Step 4: Simplify right side
    286,512.60x = 54,405,191,890.62
  5. Step 5: Solve for x
    x = 54,405,191,890.62/286,512.60
  6. Step 6: Final answer
    x = 189,887.61

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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.