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Finding the Fourth Proportional to 486,137.40, 729,424.80 and 219,760.80

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Solution

The fourth proportional to 486,137.40, 729,424.80 and 219,760.80 is: 329,740.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,137.40 : 729,424.80 = 219,760.80 : x
  2. Step 2: Convert to fraction form
    486,137.40/729,424.80 = 219,760.80/x
  3. Step 3: Cross multiply
    486,137.40x = 729,424.80 × 219,760.80
  4. Step 4: Simplify right side
    486,137.40x = 160,298,977,587.84
  5. Step 5: Solve for x
    x = 160,298,977,587.84/486,137.40
  6. Step 6: Final answer
    x = 329,740.06

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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.