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Finding the Fourth Proportional to 417.14, 625.95 and 313.72

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Solution

The fourth proportional to 417.14, 625.95 and 313.72 is: 470.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.14 : 625.95 = 313.72 : x
  2. Step 2: Convert to fraction form
    417.14/625.95 = 313.72/x
  3. Step 3: Cross multiply
    417.14x = 625.95 × 313.72
  4. Step 4: Simplify right side
    417.14x = 196,371.47
  5. Step 5: Solve for x
    x = 196,371.47/417.14
  6. Step 6: Final answer
    x = 470.75

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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.