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Finding the Fourth Proportional to 219,305.40, 302,644 and 128,662.92

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Solution

The fourth proportional to 219,305.40, 302,644 and 128,662.92 is: 177,556.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,305.40 : 302,644 = 128,662.92 : x
  2. Step 2: Convert to fraction form
    219,305.40/302,644 = 128,662.92/x
  3. Step 3: Cross multiply
    219,305.40x = 302,644 × 128,662.92
  4. Step 4: Simplify right side
    219,305.40x = 38,939,060,760.48
  5. Step 5: Solve for x
    x = 38,939,060,760.48/219,305.40
  6. Step 6: Final answer
    x = 177,556.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.