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Finding the Fourth Proportional to 435.12, 599.64 and 318.72

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Solution

The fourth proportional to 435.12, 599.64 and 318.72 is: 439.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.12 : 599.64 = 318.72 : x
  2. Step 2: Convert to fraction form
    435.12/599.64 = 318.72/x
  3. Step 3: Cross multiply
    435.12x = 599.64 × 318.72
  4. Step 4: Simplify right side
    435.12x = 191,117.26
  5. Step 5: Solve for x
    x = 191,117.26/435.12
  6. Step 6: Final answer
    x = 439.23

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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.