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Finding the Fourth Proportional to 342.45, 472.95 and 259.56

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Solution

The fourth proportional to 342.45, 472.95 and 259.56 is: 358.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.45 : 472.95 = 259.56 : x
  2. Step 2: Convert to fraction form
    342.45/472.95 = 259.56/x
  3. Step 3: Cross multiply
    342.45x = 472.95 × 259.56
  4. Step 4: Simplify right side
    342.45x = 122,758.90
  5. Step 5: Solve for x
    x = 122,758.90/342.45
  6. Step 6: Final answer
    x = 358.47

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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.