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Finding the Fourth Proportional to 403.65, 603.96 and 288.36

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Solution

The fourth proportional to 403.65, 603.96 and 288.36 is: 431.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.65 : 603.96 = 288.36 : x
  2. Step 2: Convert to fraction form
    403.65/603.96 = 288.36/x
  3. Step 3: Cross multiply
    403.65x = 603.96 × 288.36
  4. Step 4: Simplify right side
    403.65x = 174,157.91
  5. Step 5: Solve for x
    x = 174,157.91/403.65
  6. Step 6: Final answer
    x = 431.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.