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Finding the Fourth Proportional to 219,885.80, 329,828.70 and 205,140.20

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Solution

The fourth proportional to 219,885.80, 329,828.70 and 205,140.20 is: 307,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,885.80 : 329,828.70 = 205,140.20 : x
  2. Step 2: Convert to fraction form
    219,885.80/329,828.70 = 205,140.20/x
  3. Step 3: Cross multiply
    219,885.80x = 329,828.70 × 205,140.20
  4. Step 4: Simplify right side
    219,885.80x = 67,661,125,483.74
  5. Step 5: Solve for x
    x = 67,661,125,483.74/219,885.80
  6. Step 6: Final answer
    x = 307,710.30

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1.5x scale

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.