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Finding the Fourth Proportional to 486,626.80, 729,443.40 and 328,871.20

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Solution

The fourth proportional to 486,626.80, 729,443.40 and 328,871.20 is: 492,971.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,626.80 : 729,443.40 = 328,871.20 : x
  2. Step 2: Convert to fraction form
    486,626.80/729,443.40 = 328,871.20/x
  3. Step 3: Cross multiply
    486,626.80x = 729,443.40 × 328,871.20
  4. Step 4: Simplify right side
    486,626.80x = 239,892,926,290.08
  5. Step 5: Solve for x
    x = 239,892,926,290.08/486,626.80
  6. Step 6: Final answer
    x = 492,971.05

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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.