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Finding the Fourth Proportional to 1,097.38, 1,645.72 and 317.17

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Solution

The fourth proportional to 1,097.38, 1,645.72 and 317.17 is: 475.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.38 : 1,645.72 = 317.17 : x
  2. Step 2: Convert to fraction form
    1,097.38/1,645.72 = 317.17/x
  3. Step 3: Cross multiply
    1,097.38x = 1,645.72 × 317.17
  4. Step 4: Simplify right side
    1,097.38x = 521,973.01
  5. Step 5: Solve for x
    x = 521,973.01/1,097.38
  6. Step 6: Final answer
    x = 475.65

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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.