Home / 811,486.40-1,217,229.60-411,972.80

Finding the Fourth Proportional to 811,486.40, 1,217,229.60 and 411,972.80

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Solution

The fourth proportional to 811,486.40, 1,217,229.60 and 411,972.80 is: 617,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,486.40 : 1,217,229.60 = 411,972.80 : x
  2. Step 2: Convert to fraction form
    811,486.40/1,217,229.60 = 411,972.80/x
  3. Step 3: Cross multiply
    811,486.40x = 1,217,229.60 × 411,972.80
  4. Step 4: Simplify right side
    811,486.40x = 501,465,486,554.88
  5. Step 5: Solve for x
    x = 501,465,486,554.88/811,486.40
  6. Step 6: Final answer
    x = 617,959.20

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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.