Home / 1,391,926.50-1,920,825.90-819,003.78

Finding the Fourth Proportional to 1,391,926.50, 1,920,825.90 and 819,003.78

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Solution

The fourth proportional to 1,391,926.50, 1,920,825.90 and 819,003.78 is: 1,130,205.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,926.50 : 1,920,825.90 = 819,003.78 : x
  2. Step 2: Convert to fraction form
    1,391,926.50/1,920,825.90 = 819,003.78/x
  3. Step 3: Cross multiply
    1,391,926.50x = 1,920,825.90 × 819,003.78
  4. Step 4: Simplify right side
    1,391,926.50x = 1,573,163,672,821.90
  5. Step 5: Solve for x
    x = 1,573,163,672,821.90/1,391,926.50
  6. Step 6: Final answer
    x = 1,130,205.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.