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Finding the Fourth Proportional to 438, 603.60 and 403.14

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Solution

The fourth proportional to 438, 603.60 and 403.14 is: 555.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438 : 603.60 = 403.14 : x
  2. Step 2: Convert to fraction form
    438/603.60 = 403.14/x
  3. Step 3: Cross multiply
    438x = 603.60 × 403.14
  4. Step 4: Simplify right side
    438x = 243,335.30
  5. Step 5: Solve for x
    x = 243,335.30/438
  6. Step 6: Final answer
    x = 555.56

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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.