Home / 919,829.90-1,379,745.21-413,799.80

Finding the Fourth Proportional to 919,829.90, 1,379,745.21 and 413,799.80

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Solution

The fourth proportional to 919,829.90, 1,379,745.21 and 413,799.80 is: 620,699.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,829.90 : 1,379,745.21 = 413,799.80 : x
  2. Step 2: Convert to fraction form
    919,829.90/1,379,745.21 = 413,799.80/x
  3. Step 3: Cross multiply
    919,829.90x = 1,379,745.21 × 413,799.80
  4. Step 4: Simplify right side
    919,829.90x = 570,938,291,948.96
  5. Step 5: Solve for x
    x = 570,938,291,948.96/919,829.90
  6. Step 6: Final answer
    x = 620,699.86

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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.