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Finding the Fourth Proportional to 346.32, 518.67 and 285.57

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Solution

The fourth proportional to 346.32, 518.67 and 285.57 is: 427.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.32 : 518.67 = 285.57 : x
  2. Step 2: Convert to fraction form
    346.32/518.67 = 285.57/x
  3. Step 3: Cross multiply
    346.32x = 518.67 × 285.57
  4. Step 4: Simplify right side
    346.32x = 148,116.59
  5. Step 5: Solve for x
    x = 148,116.59/346.32
  6. Step 6: Final answer
    x = 427.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.