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Finding the Fourth Proportional to 426,887.92, 640,343.40 and 111,337.84

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Solution

The fourth proportional to 426,887.92, 640,343.40 and 111,337.84 is: 167,009.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,887.92 : 640,343.40 = 111,337.84 : x
  2. Step 2: Convert to fraction form
    426,887.92/640,343.40 = 111,337.84/x
  3. Step 3: Cross multiply
    426,887.92x = 640,343.40 × 111,337.84
  4. Step 4: Simplify right side
    426,887.92x = 71,294,451,014.26
  5. Step 5: Solve for x
    x = 71,294,451,014.26/426,887.92
  6. Step 6: Final answer
    x = 167,009.76

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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.