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Finding the Fourth Proportional to 417.16, 625.78 and 415.68

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Solution

The fourth proportional to 417.16, 625.78 and 415.68 is: 623.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.16 : 625.78 = 415.68 : x
  2. Step 2: Convert to fraction form
    417.16/625.78 = 415.68/x
  3. Step 3: Cross multiply
    417.16x = 625.78 × 415.68
  4. Step 4: Simplify right side
    417.16x = 260,124.23
  5. Step 5: Solve for x
    x = 260,124.23/417.16
  6. Step 6: Final answer
    x = 623.56

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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.