Home / 919,830.40-1,379,745.96-413,800.30

Finding the Fourth Proportional to 919,830.40, 1,379,745.96 and 413,800.30

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Solution

The fourth proportional to 919,830.40, 1,379,745.96 and 413,800.30 is: 620,700.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,830.40 : 1,379,745.96 = 413,800.30 : x
  2. Step 2: Convert to fraction form
    919,830.40/1,379,745.96 = 413,800.30/x
  3. Step 3: Cross multiply
    919,830.40x = 1,379,745.96 × 413,800.30
  4. Step 4: Simplify right side
    919,830.40x = 570,939,292,171.79
  5. Step 5: Solve for x
    x = 570,939,292,171.79/919,830.40
  6. Step 6: Final answer
    x = 620,700.61

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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.