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Finding the Fourth Proportional to 603.30, 832.68 and 393.18

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Solution

The fourth proportional to 603.30, 832.68 and 393.18 is: 542.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.30 : 832.68 = 393.18 : x
  2. Step 2: Convert to fraction form
    603.30/832.68 = 393.18/x
  3. Step 3: Cross multiply
    603.30x = 832.68 × 393.18
  4. Step 4: Simplify right side
    603.30x = 327,393.12
  5. Step 5: Solve for x
    x = 327,393.12/603.30
  6. Step 6: Final answer
    x = 542.67

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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.