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Finding the Fourth Proportional to 347.45, 479.78 and 260.57

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Solution

The fourth proportional to 347.45, 479.78 and 260.57 is: 359.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.45 : 479.78 = 260.57 : x
  2. Step 2: Convert to fraction form
    347.45/479.78 = 260.57/x
  3. Step 3: Cross multiply
    347.45x = 479.78 × 260.57
  4. Step 4: Simplify right side
    347.45x = 125,012.57
  5. Step 5: Solve for x
    x = 125,012.57/347.45
  6. Step 6: Final answer
    x = 359.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.