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Finding the Fourth Proportional to 486,089.20, 729,133.80 and 409,106.80

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Solution

The fourth proportional to 486,089.20, 729,133.80 and 409,106.80 is: 613,660.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,089.20 : 729,133.80 = 409,106.80 : x
  2. Step 2: Convert to fraction form
    486,089.20/729,133.80 = 409,106.80/x
  3. Step 3: Cross multiply
    486,089.20x = 729,133.80 × 409,106.80
  4. Step 4: Simplify right side
    486,089.20x = 298,293,595,689.84
  5. Step 5: Solve for x
    x = 298,293,595,689.84/486,089.20
  6. Step 6: Final answer
    x = 613,660.20

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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.