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Finding the Fourth Proportional to 579.51, 868.65 and 417.11

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Solution

The fourth proportional to 579.51, 868.65 and 417.11 is: 625.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.51 : 868.65 = 417.11 : x
  2. Step 2: Convert to fraction form
    579.51/868.65 = 417.11/x
  3. Step 3: Cross multiply
    579.51x = 868.65 × 417.11
  4. Step 4: Simplify right side
    579.51x = 362,318.26
  5. Step 5: Solve for x
    x = 362,318.26/579.51
  6. Step 6: Final answer
    x = 625.21

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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.