Home / 919,910.60-1,379,865.90-388,032.20

Finding the Fourth Proportional to 919,910.60, 1,379,865.90 and 388,032.20

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Solution

The fourth proportional to 919,910.60, 1,379,865.90 and 388,032.20 is: 582,048.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,910.60 : 1,379,865.90 = 388,032.20 : x
  2. Step 2: Convert to fraction form
    919,910.60/1,379,865.90 = 388,032.20/x
  3. Step 3: Cross multiply
    919,910.60x = 1,379,865.90 × 388,032.20
  4. Step 4: Simplify right side
    919,910.60x = 535,432,400,881.98
  5. Step 5: Solve for x
    x = 535,432,400,881.98/919,910.60
  6. Step 6: Final answer
    x = 582,048.30

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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.