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Finding the Fourth Proportional to 219,640.80, 329,461.20 and 53,428.80

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Solution

The fourth proportional to 219,640.80, 329,461.20 and 53,428.80 is: 80,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,640.80 : 329,461.20 = 53,428.80 : x
  2. Step 2: Convert to fraction form
    219,640.80/329,461.20 = 53,428.80/x
  3. Step 3: Cross multiply
    219,640.80x = 329,461.20 × 53,428.80
  4. Step 4: Simplify right side
    219,640.80x = 17,602,716,562.56
  5. Step 5: Solve for x
    x = 17,602,716,562.56/219,640.80
  6. Step 6: Final answer
    x = 80,143.20

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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.