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Finding the Third Proportional to 342.88 and 530.38

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Solution

The third proportional to 342.88 and 530.38 is: 820.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.88 : 530.38 = 530.38 : x
  2. Step 2: Convert to fraction form
    342.88/530.38 = 530.38/x
  3. Step 3: Cross multiply
    342.88x = 530.38 × 530.38
  4. Step 4: Simplify right side
    342.88x = 281,297.64
  5. Step 5: Solve for x
    x = 281,297.64/342.88
  6. Step 6: Final answer
    x = 820.41

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.