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Finding the Fourth Proportional to 599.80, 899.70 and 343.80

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Solution

The fourth proportional to 599.80, 899.70 and 343.80 is: 515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    599.80 : 899.70 = 343.80 : x
  2. Step 2: Convert to fraction form
    599.80/899.70 = 343.80/x
  3. Step 3: Cross multiply
    599.80x = 899.70 × 343.80
  4. Step 4: Simplify right side
    599.80x = 309,316.86
  5. Step 5: Solve for x
    x = 309,316.86/599.80
  6. Step 6: Final answer
    x = 515.70

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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.