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Finding the Fourth Proportional to 435.60, 599.82 and 399.12

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Solution

The fourth proportional to 435.60, 599.82 and 399.12 is: 549.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.60 : 599.82 = 399.12 : x
  2. Step 2: Convert to fraction form
    435.60/599.82 = 399.12/x
  3. Step 3: Cross multiply
    435.60x = 599.82 × 399.12
  4. Step 4: Simplify right side
    435.60x = 239,400.16
  5. Step 5: Solve for x
    x = 239,400.16/435.60
  6. Step 6: Final answer
    x = 549.59

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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.