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Finding the Fourth Proportional to 603.15, 905.18 and 487.92

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Solution

The fourth proportional to 603.15, 905.18 and 487.92 is: 732.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.15 : 905.18 = 487.92 : x
  2. Step 2: Convert to fraction form
    603.15/905.18 = 487.92/x
  3. Step 3: Cross multiply
    603.15x = 905.18 × 487.92
  4. Step 4: Simplify right side
    603.15x = 441,656.38
  5. Step 5: Solve for x
    x = 441,656.38/603.15
  6. Step 6: Final answer
    x = 732.25

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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.