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Finding the Fourth Proportional to 417.17, 575.80 and 317.87

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Solution

The fourth proportional to 417.17, 575.80 and 317.87 is: 438.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.17 : 575.80 = 317.87 : x
  2. Step 2: Convert to fraction form
    417.17/575.80 = 317.87/x
  3. Step 3: Cross multiply
    417.17x = 575.80 × 317.87
  4. Step 4: Simplify right side
    417.17x = 183,028.03
  5. Step 5: Solve for x
    x = 183,028.03/417.17
  6. Step 6: Final answer
    x = 438.73

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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.