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Finding the Fourth Proportional to 346.64, 520.45 and 340.49

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Solution

The fourth proportional to 346.64, 520.45 and 340.49 is: 511.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.64 : 520.45 = 340.49 : x
  2. Step 2: Convert to fraction form
    346.64/520.45 = 340.49/x
  3. Step 3: Cross multiply
    346.64x = 520.45 × 340.49
  4. Step 4: Simplify right side
    346.64x = 177,204.57
  5. Step 5: Solve for x
    x = 177,204.57/346.64
  6. Step 6: Final answer
    x = 511.21

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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.