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Finding the Fourth Proportional to 456.10, 682.55 and 417.70

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Solution

The fourth proportional to 456.10, 682.55 and 417.70 is: 625.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.10 : 682.55 = 417.70 : x
  2. Step 2: Convert to fraction form
    456.10/682.55 = 417.70/x
  3. Step 3: Cross multiply
    456.10x = 682.55 × 417.70
  4. Step 4: Simplify right side
    456.10x = 285,101.14
  5. Step 5: Solve for x
    x = 285,101.14/456.10
  6. Step 6: Final answer
    x = 625.08

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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.