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Finding the Fourth Proportional to 388,613.80, 582,920.70 and 222,418.60

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Solution

The fourth proportional to 388,613.80, 582,920.70 and 222,418.60 is: 333,627.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,613.80 : 582,920.70 = 222,418.60 : x
  2. Step 2: Convert to fraction form
    388,613.80/582,920.70 = 222,418.60/x
  3. Step 3: Cross multiply
    388,613.80x = 582,920.70 × 222,418.60
  4. Step 4: Simplify right side
    388,613.80x = 129,652,406,005.02
  5. Step 5: Solve for x
    x = 129,652,406,005.02/388,613.80
  6. Step 6: Final answer
    x = 333,627.90

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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.