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Finding the Fourth Proportional to 219,445.28, 302,828.28 and 130,021.28

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Solution

The fourth proportional to 219,445.28, 302,828.28 and 130,021.28 is: 179,425.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,445.28 : 302,828.28 = 130,021.28 : x
  2. Step 2: Convert to fraction form
    219,445.28/302,828.28 = 130,021.28/x
  3. Step 3: Cross multiply
    219,445.28x = 302,828.28 × 130,021.28
  4. Step 4: Simplify right side
    219,445.28x = 39,374,120,585.80
  5. Step 5: Solve for x
    x = 39,374,120,585.80/219,445.28
  6. Step 6: Final answer
    x = 179,425.69

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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.