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Finding the Fourth Proportional to 481,543.20, 664,640.20 and 320,405.04

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Solution

The fourth proportional to 481,543.20, 664,640.20 and 320,405.04 is: 442,232.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,543.20 : 664,640.20 = 320,405.04 : x
  2. Step 2: Convert to fraction form
    481,543.20/664,640.20 = 320,405.04/x
  3. Step 3: Cross multiply
    481,543.20x = 664,640.20 × 320,405.04
  4. Step 4: Simplify right side
    481,543.20x = 212,954,069,866.61
  5. Step 5: Solve for x
    x = 212,954,069,866.61/481,543.20
  6. Step 6: Final answer
    x = 442,232.53

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1.5x scale

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.