Home / 812,000.69-1,217,447.45-411,869.90

Finding the Fourth Proportional to 812,000.69, 1,217,447.45 and 411,869.90

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Solution

The fourth proportional to 812,000.69, 1,217,447.45 and 411,869.90 is: 617,524.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,000.69 : 1,217,447.45 = 411,869.90 : x
  2. Step 2: Convert to fraction form
    812,000.69/1,217,447.45 = 411,869.90/x
  3. Step 3: Cross multiply
    812,000.69x = 1,217,447.45 × 411,869.90
  4. Step 4: Simplify right side
    812,000.69x = 501,429,957,427.41
  5. Step 5: Solve for x
    x = 501,429,957,427.41/812,000.69
  6. Step 6: Final answer
    x = 617,524.05

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1.5x scale

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.