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Finding the Fourth Proportional to 342.86, 513.99 and 284.92

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Solution

The fourth proportional to 342.86, 513.99 and 284.92 is: 427.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.86 : 513.99 = 284.92 : x
  2. Step 2: Convert to fraction form
    342.86/513.99 = 284.92/x
  3. Step 3: Cross multiply
    342.86x = 513.99 × 284.92
  4. Step 4: Simplify right side
    342.86x = 146,443.46
  5. Step 5: Solve for x
    x = 146,443.46/342.86
  6. Step 6: Final answer
    x = 427.12

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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.