Home / 811,999.25-1,217,445.29-411,868.46

Finding the Fourth Proportional to 811,999.25, 1,217,445.29 and 411,868.46

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Solution

The fourth proportional to 811,999.25, 1,217,445.29 and 411,868.46 is: 617,521.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,999.25 : 1,217,445.29 = 411,868.46 : x
  2. Step 2: Convert to fraction form
    811,999.25/1,217,445.29 = 411,868.46/x
  3. Step 3: Cross multiply
    811,999.25x = 1,217,445.29 × 411,868.46
  4. Step 4: Simplify right side
    811,999.25x = 501,427,319,255.33
  5. Step 5: Solve for x
    x = 501,427,319,255.33/811,999.25
  6. Step 6: Final answer
    x = 617,521.90

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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.