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Finding the Fourth Proportional to 426,779.72, 640,206.48 and 111,236.63

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Solution

The fourth proportional to 426,779.72, 640,206.48 and 111,236.63 is: 166,864.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,779.72 : 640,206.48 = 111,236.63 : x
  2. Step 2: Convert to fraction form
    426,779.72/640,206.48 = 111,236.63/x
  3. Step 3: Cross multiply
    426,779.72x = 640,206.48 × 111,236.63
  4. Step 4: Simplify right side
    426,779.72x = 71,214,408,555.47
  5. Step 5: Solve for x
    x = 71,214,408,555.47/426,779.72
  6. Step 6: Final answer
    x = 166,864.56

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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.