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Finding the Fourth Proportional to 558.36, 770.31 and 348.48

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Solution

The fourth proportional to 558.36, 770.31 and 348.48 is: 480.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.36 : 770.31 = 348.48 : x
  2. Step 2: Convert to fraction form
    558.36/770.31 = 348.48/x
  3. Step 3: Cross multiply
    558.36x = 770.31 × 348.48
  4. Step 4: Simplify right side
    558.36x = 268,437.63
  5. Step 5: Solve for x
    x = 268,437.63/558.36
  6. Step 6: Final answer
    x = 480.76

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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.