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Finding the Fourth Proportional to 347.36, 520.64 and 130.72

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Solution

The fourth proportional to 347.36, 520.64 and 130.72 is: 195.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.36 : 520.64 = 130.72 : x
  2. Step 2: Convert to fraction form
    347.36/520.64 = 130.72/x
  3. Step 3: Cross multiply
    347.36x = 520.64 × 130.72
  4. Step 4: Simplify right side
    347.36x = 68,058.06
  5. Step 5: Solve for x
    x = 68,058.06/347.36
  6. Step 6: Final answer
    x = 195.93

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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.