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Finding the Fourth Proportional to 558.02, 770.42 and 348.28

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Solution

The fourth proportional to 558.02, 770.42 and 348.28 is: 480.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.02 : 770.42 = 348.28 : x
  2. Step 2: Convert to fraction form
    558.02/770.42 = 348.28/x
  3. Step 3: Cross multiply
    558.02x = 770.42 × 348.28
  4. Step 4: Simplify right side
    558.02x = 268,320.82
  5. Step 5: Solve for x
    x = 268,320.82/558.02
  6. Step 6: Final answer
    x = 480.84

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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.