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Finding the Fourth Proportional to 440.38, 607.39 and 393.16

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Solution

The fourth proportional to 440.38, 607.39 and 393.16 is: 542.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.38 : 607.39 = 393.16 : x
  2. Step 2: Convert to fraction form
    440.38/607.39 = 393.16/x
  3. Step 3: Cross multiply
    440.38x = 607.39 × 393.16
  4. Step 4: Simplify right side
    440.38x = 238,801.45
  5. Step 5: Solve for x
    x = 238,801.45/440.38
  6. Step 6: Final answer
    x = 542.26

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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.