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Finding the Fourth Proportional to 219,813.80, 329,720.70 and 205,068.20

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Solution

The fourth proportional to 219,813.80, 329,720.70 and 205,068.20 is: 307,602.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,813.80 : 329,720.70 = 205,068.20 : x
  2. Step 2: Convert to fraction form
    219,813.80/329,720.70 = 205,068.20/x
  3. Step 3: Cross multiply
    219,813.80x = 329,720.70 × 205,068.20
  4. Step 4: Simplify right side
    219,813.80x = 67,615,230,451.74
  5. Step 5: Solve for x
    x = 67,615,230,451.74/219,813.80
  6. Step 6: Final answer
    x = 307,602.30

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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.