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Finding the Fourth Proportional to 437.21, 603.02 and 289.58

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Solution

The fourth proportional to 437.21, 603.02 and 289.58 is: 399.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.21 : 603.02 = 289.58 : x
  2. Step 2: Convert to fraction form
    437.21/603.02 = 289.58/x
  3. Step 3: Cross multiply
    437.21x = 603.02 × 289.58
  4. Step 4: Simplify right side
    437.21x = 174,618.07
  5. Step 5: Solve for x
    x = 174,618.07/437.21
  6. Step 6: Final answer
    x = 399.40

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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.