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Finding the Fourth Proportional to 403.56, 555.30 and 348.03

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Solution

The fourth proportional to 403.56, 555.30 and 348.03 is: 478.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.56 : 555.30 = 348.03 : x
  2. Step 2: Convert to fraction form
    403.56/555.30 = 348.03/x
  3. Step 3: Cross multiply
    403.56x = 555.30 × 348.03
  4. Step 4: Simplify right side
    403.56x = 193,261.06
  5. Step 5: Solve for x
    x = 193,261.06/403.56
  6. Step 6: Final answer
    x = 478.89

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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.