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Finding the Fourth Proportional to 399,342.80, 598,236.60 and 221,531.60

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Solution

The fourth proportional to 399,342.80, 598,236.60 and 221,531.60 is: 331,866.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,342.80 : 598,236.60 = 221,531.60 : x
  2. Step 2: Convert to fraction form
    399,342.80/598,236.60 = 221,531.60/x
  3. Step 3: Cross multiply
    399,342.80x = 598,236.60 × 221,531.60
  4. Step 4: Simplify right side
    399,342.80x = 132,528,311,176.56
  5. Step 5: Solve for x
    x = 132,528,311,176.56/399,342.80
  6. Step 6: Final answer
    x = 331,866.03

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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.