Home / 438,910.80-658,366.20-320,812.80

Finding the Fourth Proportional to 438,910.80, 658,366.20 and 320,812.80

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Solution

The fourth proportional to 438,910.80, 658,366.20 and 320,812.80 is: 481,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,910.80 : 658,366.20 = 320,812.80 : x
  2. Step 2: Convert to fraction form
    438,910.80/658,366.20 = 320,812.80/x
  3. Step 3: Cross multiply
    438,910.80x = 658,366.20 × 320,812.80
  4. Step 4: Simplify right side
    438,910.80x = 211,212,304,047.36
  5. Step 5: Solve for x
    x = 211,212,304,047.36/438,910.80
  6. Step 6: Final answer
    x = 481,219.20

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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.