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Finding the Fourth Proportional to 435.70, 601.77 and 318.21

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Solution

The fourth proportional to 435.70, 601.77 and 318.21 is: 439.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.70 : 601.77 = 318.21 : x
  2. Step 2: Convert to fraction form
    435.70/601.77 = 318.21/x
  3. Step 3: Cross multiply
    435.70x = 601.77 × 318.21
  4. Step 4: Simplify right side
    435.70x = 191,489.23
  5. Step 5: Solve for x
    x = 191,489.23/435.70
  6. Step 6: Final answer
    x = 439.50

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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.