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Finding the Fourth Proportional to 437.06, 603.40 and 289.90

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Solution

The fourth proportional to 437.06, 603.40 and 289.90 is: 400.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.06 : 603.40 = 289.90 : x
  2. Step 2: Convert to fraction form
    437.06/603.40 = 289.90/x
  3. Step 3: Cross multiply
    437.06x = 603.40 × 289.90
  4. Step 4: Simplify right side
    437.06x = 174,921.19
  5. Step 5: Solve for x
    x = 174,921.19/437.06
  6. Step 6: Final answer
    x = 400.22

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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.