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Finding the Fourth Proportional to 486,012.91, 728,935.30 and 219,711.49

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Solution

The fourth proportional to 486,012.91, 728,935.30 and 219,711.49 is: 329,529.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,012.91 : 728,935.30 = 219,711.49 : x
  2. Step 2: Convert to fraction form
    486,012.91/728,935.30 = 219,711.49/x
  3. Step 3: Cross multiply
    486,012.91x = 728,935.30 × 219,711.49
  4. Step 4: Simplify right side
    486,012.91x = 160,155,459,328.90
  5. Step 5: Solve for x
    x = 160,155,459,328.90/486,012.91
  6. Step 6: Final answer
    x = 329,529.23

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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.