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Finding the Fourth Proportional to 603.72, 832.88 and 393.93

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Solution

The fourth proportional to 603.72, 832.88 and 393.93 is: 543.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.72 : 832.88 = 393.93 : x
  2. Step 2: Convert to fraction form
    603.72/832.88 = 393.93/x
  3. Step 3: Cross multiply
    603.72x = 832.88 × 393.93
  4. Step 4: Simplify right side
    603.72x = 328,097.40
  5. Step 5: Solve for x
    x = 328,097.40/603.72
  6. Step 6: Final answer
    x = 543.46

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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.